I disagree on both points. Are we forgetting about the first fight where Wilder almost KO-d fury twice?
But that's all he's got. He's would need to start from scratch to put together more skills than simply waiting to unleash one huge punch. Most of his matches were a waiting game until that moment can happen. Since he didn't get started until 20 and is now 34 it would be pretty miraculous for him to be reborn as a fully rounded boxer.
If he retains his main trainer then it's clear he's not very interested in changing or learning and the talk of going out on his shield is daffy. I would've had a corner clear out just like Fury.
I've no doubt he'll be sharper next time. That may not make him any better a boxer.