Honestly I've never really been a fan of time limits myself. I like being able to muck about doing as I choose and only having to focus on story and such when I want to.
Though a lot of games aren't too bad with them. I mean, ADoM's time limit isn't terrible. Hell, most games I will finish before day 90 anyway.
I just wanted to add that bracers of purity completely trivialize background corruption anyway. (Blessed BoP completely counter it) This pretty much removes corruption as a serious threat in the game.
The interval for background corruption increases is now 100 days instead of 90, at least as of 3.0.5, and has been there for Biskup knows how long. And no one noticed