So basically you don't want Jeremy as the MC. You want someone who looks like Jeremy. With a completely different character development.
Obviously. Changing the status from an npc to mc in a game makes a drastic change. Current Jeremy is not even in control of his actions, Ian and Lena are. By making Jeremy main character you could easily write his beginning like he's written in the game, but then maybe develop him into having options of being more considerate and focused on the grand scheme of things, give him more agency and choices. He could keep being a player or focus on one female. Become a successful ceo or a porn star. Or both. Or a crackhead.
Ashley Graham in GGGB starts as a shy book nerd in love with her plain boyfriend. Now, can you describe her character by the end of the game?
I'm truly hoping he'll end up being more than a walking BBC trope, cause right now he ain't much more.
That is something I don't understand. Why people have problems with Jeremy being walking BBC trope? Do they also complain about Perry being an insecure nerd trope? Seymour being evil powerful man trope? Wade being lazy fucker with hot gf trope? Axel being dominant chad player trope? Robert being walking MWC (medium white cock) trope? Etc? Females are better in this game, because Eva likes to focus on them more, just like she did in GGGB. Holly is developing nicely for example. Alison is relatable in my opinion and I really like her as well, not just because of her body.
Still, those are npcs in a porn cartoon video game. I know Eva is ambitious and hard working, but she's just one writer with plenty of characters to care for and she's also drawing and leading this whole business. As far as side character depth go, I think she's doing fine job.