Okay, so my opinion on what's going on right now in the FNAF fandom. I do not support age gaps. I think it is creepy. So I looked up Vincent's og age.
At the bite of November 1987 accident with Mike, Vincent was 27. But when Mike got older, Vincent got too. Maybe about 20 years passed, so Vincent at that point was in his late 40's when he worked with others. I do not like or support the og AU (also once Rebornica replaced Vincent with Andros, which was more of canon FNAF take, where Andros was Mike's dad and the puppet was his ma). Makes me shiver.
If we are at this point, we can't ship og JereMike, because they have more of a father-son dynamic, with Mike teaching him and cheering him up like a father figure, or PurplePhone, because og Vincent was pushing himself onto og Scott who didn't wanted it, and didn't really loved him. Vincent never took Scott's "no" for an answer, which is also unsettling.
So, my take on this is, if your AU's story is diffrent enough (diffrent enough to be it's own diffrent seperate story, and also have more similiar character ages) than canon Rebornica one, then that's okay (like with FNAF UCN and Five Nights at Frickbear's 3. Same concept, diffrent story, diffrent takes). Unless there are morally questionable things, then no, I don't support that, please go.
We all took our own takes on this Rebornica AU. With our own diffrent stories, diffrent designs, diffrent takes, diffrent ships. Seperating it from original Rebornica AU. Like, my Fritz is trans woman, Scott is as evil as Vincent, Doll and Chris are awsome siblings, and so on. As long as it don't have weird things like og had, I don't really care. To be honest, I don't really ship that much. Maybe Scott and Vincent, or Mike and Doll (not og ones, AU ones). So yeah.
As for the argument in the fandom. If you are calling someone a larper, that doesn't really help the already small fandom. It's better to ignore, or educate someone on why the og AU was and still is bad, than calling someone names. I hope we seperate our own AUs from the og one, and make it our own thing, ignoring and/or forgetting the og AU and Rebornica themselfs. Don't give them an attention. It's better to move on from them.
And please, don't compare other's AU to the og one. If it's AU ship with similiar ages, then leave it be. However, if you'll see a weird AU ship, just block it, and ignore it. Do not give them your attention. Also yes, if someone does something morally wrong, you can call the behaviour out. But only after having evidence of the doing, not by just a word.
(Personal note: I wanna add that I was the victim of age gap relationship years ago, where an older guy took advantage of me online. I know it is awful. And I don't wish it upon anyone. We had to move because of it. But also, it makes me feel sad, maybe even dissapointed when we treat fictional characters like if it was a real person or a real situation. Real events are much more scary than a fanfic, because it happened in real world, and it involves real people. Please, if you really wanna help, donate to charities that helps people that left their awful relationship situation. And if you know one, check on them if they are doing okay. Also no, don't feel pity or worry for me. I don't want it. I just wanna forget that this happened to me. I wanna move on and leave it behind.)