Whatever influence Augustine or any other ancient teacher/leader/scholar etc. might have wielded in ancient times has long since been recognized and nullified. Modern bible scholars have access to virtually every known Bible manuscript with a touch on a keyboard.
Not all patristic fathers taught "limited punishment." Here is 2 pages of 3 from the ECF I did on my own.
•Second Clement 5:5 [A.D. 150]).
"If we do the will of Christ, we shall obtain rest; but if not, if we neglect his commandments, nothing will rescue us from eternal punishment"
• (Second Clement ibid., 17:7)
"But when they see how those who have sinned and who have denied Jesus by their words or by their deeds are punished with terrible torture in unquenchable fire, the righteous, who have done good, and who have endured tortures and have hated the luxuries of life, will give glory to their God saying, ‘There shall be hope for him that has served God with all his heart!’".
•Ignatius of Antioch[a student of John]
"Corrupters of families will not inherit the kingdom of God. And if they who do these things according to the flesh suffer death, how much more if a man corrupt by evil teaching the faith of God for the sake of which Jesus Christ was crucified? A man become so foul will depart into unquenchable fire: and so will anyone who listens to him" (Letter to the Ephesians 16:1–2 [A.D. 110]).
• Justin Martyr
"No more is it possible for the evildoer, the avaricious, and the treacherous to hide from God than it is for the virtuous. Every man will receive the eternal punishment or reward which his actions deserve. Indeed, if all men recognized this, no one would choose evil even for a short time, knowing that he would incur the eternal sentence of fire. On the contrary, he would take every means to control himself and to adorn himself in virtue, so that he might obtain the good gifts of God and escape the punishments"
• (First Apology 12 [A.D. 151]).
"We have been taught that only they may aim at immortality who have lived a holy and virtuous life near to God. We believe that they who live wickedly and do not repent will be punished in everlasting fire" (ibid., 21).
"[Jesus] shall come from the heavens in glory with his angelic host, when he shall raise the bodies of all the men who ever lived. Then he will clothe the worthy in immortality; but the wicked, clothed in eternal sensibility, he will commit to the eternal fire, along with the evil demons" (ibid., 52).
• The Martyrdom of Polycarp
"Fixing their minds on the grace of Christ, [the martyrs] despised worldly tortures and purchased eternal life with but a single hour. To them, the fire of their cruel torturers was cold. They kept before their eyes their escape from the eternal and unquenchable fire"
• (Martyrdom of Polycarp 2:3 [A.D. 155]).
Mathetes
"When you know what is the true life, that of heaven; when you despise the merely apparent death, which is temporal; when you fear the death which is real, and which is reserved for those who will be condemned to the everlasting fire, the fire which will punish even to the end those who are delivered to it, then you will condemn the deceit and error of the world" (Letter to Diognetus 10:7 [A.D. 160]).
• Athenagoras
"[W]e [Christians] are persuaded that when we are removed from this present life we shall live another life, better than the present one. . . . Then we shall abide near God and with God, changeless and free from suffering in the soul . . . or if we fall with the rest [of mankind], a worse one and in fire; for God has not made us as sheep or beasts of burden, a mere incidental work, that we should perish and be annihilated" (Plea for the Christians 31 [A.D. 177]).
• Theophilus of Antioch
"Give studious attention to the prophetic writings [the Bible] and they will lead you on a clearer path to escape the eternal punishments and to obtain the eternal good things of God. . . . [God] will examine everything and will judge justly, granting recompense to each according to merit. To those who seek immortality by the patient exercise of good works, he will give everlasting life, joy, peace, rest, and all good things. . . . For the unbelievers and for the contemptuous, and for those who do not submit to the truth but assent to iniquity, when they have been involved in adulteries, and fornications, and homosexualities, and avarice, and in lawless idolatries, there will be wrath and indignation, tribulation and anguish; and in the end, such men as these will be detained in everlasting fire" (To Autolycus 1:14 [A.D. 181])
• Irenaeus[Student of Polycarp a student of John]
"[God will] send the spiritual forces of wickedness, and the angels who transgressed and became apostates, and the impious, unjust, lawless, and blasphemous among men into everlasting fire" (Against Heresies 1:10:1 [A.D. 189]).
"The penalty increases for those who do not believe the Word of God and despise his coming. . . . t is not merely temporal, but eternal. To whomsoever the Lord shall say, ‘Depart from me, accursed ones, into the everlasting fire,’ they will be damned forever" (ibid., 4:28:2).
• Tertullian
"After the present age is ended he will judge his worshipers for a reward of eternal life and the godless for a fire equally perpetual and unending"
• (Apology 18:3 [A.D. 197]).
"Then will the entire race of men be restored to receive its just deserts according to what it has merited in this period of good and evil, and thereafter to have these paid out in an immeasurable and unending eternity. Then there will be neither death again nor resurrection again, but we shall be always the same as we are now, without changing. The worshipers of God shall always be with God, clothed in the proper substance of eternity. But the godless and those who have not turned wholly to God will be punished in fire equally unending, and they shall have from the very nature of this fire, divine as it were, a supply of incorruptibility" (ibid., 44:12–13).
• Hippolytus
"Standing before [Christ’s] judgment, all of them, men, angels, and demons, crying out in one voice, shall say: ‘Just is your judgment!’ And the righteousness of that cry will be apparent in the recompense made to each. To those who have done well, everlasting enjoyment shall be given; while to the lovers of evil shall be given eternal punishment. The unquenchable and unending fire awaits these latter, and a certain fiery worm which does not die and which does not waste the body but continually bursts forth from the body with unceasing pain. No sleep will give them rest; no night will soothe them; no death will deliver them from punishment; no appeal of interceding friends will profit them" (Against the Greeks 3 [A.D. 212]).