I would like to see some content when corruption is used for practical reasons rather than another boring “mind break”.
If someone used the opportunity to voluntarily transform themselves into a demon for they own goals that could be cool. Even if this goals are as uninspired as "power" or "For science!".
We also could see something interesting, like a fallen protector of the community that failed his duties. Maybe he transformed himself into a demon to have the powers necessary to actually stop the other demons. Maybe protection of the humanity against corruption will become his demonic obsession.
The idea of Champ corrupting someone else for practical reasons instead of just being an awful person is interesting too.
If it's another "woah I am your slut/sex-slave now" than count me out. Not a lot of it in this game maybe but it's already overused in other media, in my opinion. Never was a fan of the trope anyway.
ngl the plot you said is quite solid, like:
-Berwyn surrendering his soul to become powerful enough to yeet Matiha into the shadows realm/submit her into cock gobling him for the rest of eternity.
-Cait being too tempted out (lied to or double crossed(?)) into daemonhood for the regret or the naivetee thinking that can bring her sister back (remember that she got an encounter with a lesser wraith with us when she tried to summon a portal)
-US becoming a demon because "shit and giggles" (bad end?)
-Quinn can be corrupted by "accident" (he has a grimoire dating back the gods war) or to pursue further lust power to get tabs against Tollus
-Garreth (easy) to pusue his dream of becoming the strongest (If weyr doesn't comes back)
-Arona can be included as well because musclehead (her obsession could be seek revenge against you for domming her and blueballing her?)
Posibilities can be infinite when adding purposeful corruption tbh
