What I'm worried about is something that has been stated before. It's "fun" to wanna play a bad guy, from a distance... Once you get to the nitty gritty (choose your own God & think of different scenarios), maybe some will find this game exceptionally offensive... I mean, aren't the Chaos Gods based on Mankind's deepest & most primal fears (violence, insanity, disease, sexual deviation)?
I think the devs diary entry here will help you:
It really puts that second spin on things, the chaos gods, while yes do have that side to them, also have the other sides, and other facets too their worship. There is more to heaven and earth than read on twisting and writhing words written on eldrich scrolls, Horatio.
There should be a patron saint of Lycra.
I suspect that as the whole point of this game would be for your character to be a servant of the ruinous powers, it wouldn't work for your character to ever become completely unplayable due to insanity.
I'm not convinced. Playing with fire should always be done with caution, after all. I certainly think there's such a thing as 'too much warpstone/insanity', and I feel it would help make the game something other than a gore-fest for players to have to manage their insanity/corruption to keep things within a playable threshold. I personally don't want to play a game where there is no brake on player/pc depravity.
After all: Under the RoC rules you could blobble into a chaos spawn due to bad luck. With great power comes great...risk, mostly.