Isn't the question if they are important or not to ministry?
Since anyone, right with God or not, can have all the miracles according to Matthew, how does having them or not having them become a requirement when those lost and heading for hell have them?
Doctrine, beliefs, signs, wonders ... have nothing to do with Christianity or God, according to scripture. They may be essential for those who have false doctrines, false gospels, erroneous beliefs that won't result in salvation ... to continue believing their false beliefs just like those in Matthew 7, but what says they are essential to any real Christian ministry, and how can you tell the difference if their own members (Matthew 7 again) can't even tell that they aren't really Christians?
Next is why couldn't Paul even heal a man after his own heart, a fellow Christian and worker towards the end of his ministry. Was it a lack of faith on the part of Paul? Why the affirmation that God had mercy when years before every person who had a shadow pass over them was healed from all of their infirmities without any restrictions?
To start with we had:
Act 5:15 to such an extent that they even carried the sick out into the streets and laid them on cots and pallets, so that when Peter came by at least his shadow might fall on any one of them.
Act 5:16 Also the people from the cities in the vicinity of Jerusalem were coming together, bringing people who were sick or afflicted with unclean spirits, and they were all being healed.
Towards the end of the time scripture was being written we have:
Php 2:25 But I thought it necessary to send to you Epaphroditus, my brother and fellow worker and fellow soldier, who is also your messenger and minister to my need;
Php 2:26 because he was longing for you all and was distressed because you had heard that he was sick.
Php 2:27 For indeed he was sick to the point of death, but God had mercy on him, and not on him only but also on me, so that I would not have sorrow upon sorrow.
The question is, why make such a big deal over a fellow brother, fellow worker, and fellow soldier of Christ being healed when even the slightest sickness "should have been" and "would have been" healed just with a shadows passing at the time recorded in the early church in Acts. Unless Paul lied about Epaphroditus or Paul's faith was lacking, there really is no way to explain this change if everything remained as it was in the early church.
But then this is just a small portion of the data that pertains to the topic. To be thorough and go through everything covers many dozens of passages, and even more pages of examination, word studies ... If anyone really wants to look through all of it, e-mail me.