Hebrews 8:10-12 "For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people: And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest. For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
The Covenant is not obsolete as Jesus has not come back with a with a scepter of iron Revelation 19:15.
From the perspective of your faith you are correct. From the perspective of your responsibility to you congregation, the Covenant must be in place.
-----------------------------------------
Matthew 7:15 "Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves. . Ye shall know them by their fruits.
The only way to discern the fruits are by the Law, otherwise it is just an opinion.
-------------------------------------------
The Levitical Laws are not pertinent. Priestly cleansing is not required.
Revelations 4 The High Priest (the Lamb) is Perfect. The temple is Spiritual. The Holy of Holies is no longer needed as the Lamb is on the right hand side of God.