I made a comment on something but I thought it would also be good here so...
TBH my main problem with Alastor is that the show and Alastor keep TELLING us how mysterious, cool and powerful he is instead of actually showing us, so it makes him extremely grating to watch when he acts like he's the coolest thing in the room. Pilot Alastor was so much fun BECAUSE he still acted like the jaunty Radio man he was in his prime DESPITE what he's achieved in Hell, he was so casual and I loved that.
Also why the f*ck did they make the one to get get dumped and the one we're supposed to feel sorry for...A Villain? Like, wouldn't make more sense if the show made us feel bad for Alastor and explore how Aphobia and the obsession with relationships our world has can tear friendships apart, or have the Villain be the one to dump one of the main cast and admit to them they were only using them? Like, I hold the opinion that the Hellaverse has a constant problem of not letting the Main Cast be bad people on more than a surface level, but why are you choosing to Woobify the man who literally forced an Asexual man to watch him and his partner bone a scene before instead of one of the Main Cast who we are supposed to sympathise with?
I wish they put all this ‘tries to be cooler than he actually is’ energy they put into Alastor into Sir Pentious, just with a more ‘Saturday Morning Cartoon Villain’ spin to it. Like, in the sense that he acts like everyone should know him and how he’s going to be a powerful threat when he’s a powerful Overlord/he is a powerful threat now, but since he’s the comedic character it can instead be played for comedy where everyone is constantly forgetting about him and doesn’t take him seriously, and he constantly gets the sh*t kicked out of him because he’s an ordinary Sinner going up against literal OVERLORDS. Like, imagine him acting like him and Vox have this massive rivalry, but Vox keeps on forgetting about him and just sees him as, ‘the guy I dumped years ago’, since it could be interesting to have it be Vox who dumps Pentious instead, Pentious could even still have lingering unrequited feelings for Vox which could be interesting, especially with Vox’s relationship with Val (or just use it as an excuse to have an ‘On My Own’ parody IDK). Also him losing to Shok.Wav would also make more sense because again, literal Sinner against Overlord’s shark. It could also make for some interesting deconstruction on why he acts like this (it could be a mask maybe?), and could have a ton of routes for a character arc depending if you want to redeem him or not. Plus if we transfer the ‘Has his owned by Rosie’ and actually make her an antagonist it could be a more equal parallel to Angel Dust than Husk is and we could do SirDust instead (I know they’re doing to address HuskerDust’s differences in Season 3 but come on, why did you wait that long?), also her more jaunty personality (which I would keep when she’s being evil cause that’s always fun) would be a very fun contrast to Valentino’s (cause I make him more serious than he is in the show), plus it could make for some scary horror sequences (like, imagine her forcing him to eat Sinner meat ooooooh).
In terms of the other characters, If we keep Alastor we could just make him like he was in the Pilot, not in a contract with anyone and maybe could have no tragic backstory to make him extra fun, which could contrast Sir Pentious if we give him an extremely tragic backstory. Alastor could either be more of a character who aids in other’s arcs, or he could have an arc of becoming more human/open with everybody, since he could cling onto his ‘Jaunty Radioman persona’ and maybe is trying to get rid of his humanity/doesn’t see himself as human. Or maybe we could get rid of Alastor entirely and just give the Powerful Overlord Investor role to Niffty instead, who may put up the facade of a boy-crazy ditz to hide how cruel and clever she actually is, maybe to get her opponents and enemies (and audience) to underestimate her power. It could lend to some fun gags where she solves something for the gang or in the background. Not to mention it could be a fun way to make a Tumblr SexyWoman, since there’s a severe lack of those, and we could make Husk AroAce since SirDust would be a thing instead. Plus you could use this opportunity to add Cherri Bomb to the Main Cast and have the Cast consist of Seven Main Characters (since I wouldn’t add Baxter to the cast or redeem Pentious so early), which could be a fun nod to the Seven Deadly Sins with each character representing a Sin each.
IDK that’s all I’ve got. Pilot Alastor please come back. We all miss you. We miss you a lot.