I for one would like to see a simple "faith' stat included
as a basic character you begin with a faith stat of zero againts all religions.. (unless you are a cleric). as you do things that favour a gods' interest your faith stat goes up, as you oppose a god you faith stat goes down
You can then take this stat/modifier to affect the outcome of channeling spells.
i.e. a cleric casts a +10 bonus spell on you, since you have a high faith stat with that religion your bonus is now +15.
and vice versa, 2 months ago you foil johnny McEbol_Gods' plan of doom, and killed his evil priests in the process. you now have a negative faith stat for that religion, you meet with one of these clerics who attmpts to bless you (unkowing of your previous actions)
that +10 noe becomes a -5..wow you just got cursed!