These players have had a year playing in this system, they'll be able to look at what they did wrong both last season and the season before and correct it. When you think about it, there are currently no players (aside from Burke) who are actively trying to leave, whereas before you had players like Lopes, Lichaj and Irvine who had one eye on leaving during lockdown. That obviously created a negative atmosphere that contributed to the spiral, as well as some woeful performances.
It's different this time, we're coming off the back of a very successful campaign where our players were able to excel and grow in confidence, I can't see these lads simply reverting to their previous Championship selves simply because we've gone back up a league.
I think KLP will relish the challenge, as will Magennis and Elder (who is in line for an international call up if he continues his form.). I agree about Wilks, but I think Grant will be at him to do exactly what you said.