I can say that while you have a reason to think he shouldn't come back, because of well ... That, I need to clarify some things

First, yes Creepyproduce left his character a lot ago, but it really depends if he's getting better or not his personal life, he can either trying to change for himself, taking s break in general to be mentally better or in bad cases, doing the exact same thing but now not showing it in public, or doing self damage, that said I think it's more the good case

Now about the discord audio as I have saw a lot of people misunderstanding it, I agree that he didn't showed up a professional attitude, but none of the members of that audio did either, and also it doesn't mean automatically that he didn't changed, as far as I'm aware, in that situation, he was on therapy, but he healed a lot faster and just like everyone else, wanted to move on, this case happened with Agate herself too, where she healed faster than normal, but again I'm going to say that none of the call, including Creepy himself were professional.. it was cringe actually.

Finally, a final thought, I'm going to say I'm glad he has been missing for a long time, making him not focusing on similar situations, and enjoying his life more, as well as having time to think the messed up thing he did, showing already me that yeah he has been changing.

That said I hope people can forget this and forgave him if he shows a real change as a person, as while he did was beyond awful, seeing it, it's not a case that we can't forgive as there's also a lot of worse variations that it can't be forgiven, even if that person changes, or at least makes it hard enough

This is my opinion tho