While playing the beta one thing I missed from the old game was an in game explaination as to what each god likes and dislikes. What would make you gain piety and what makes you lose it. As far as I can tell there no real way without trial and error to figure out how the current gods work.
I figured out that Taurog, likes you killing stuff and dislikes magic use. and converting his weapons and armor is bad. however Mysteria is a bit more complex, She likes you using magic and dislikes you converting magic but that all I figured out.
I just got Tikki and Glowing Guardian doesn't seem to react with Helpme glyphs or Cydstepp actually I seem to gain piety from converting Cydstep.
So ya, someway to know in game what helps you gain piety or lose piety without having to look up on Wiki or the forums woudl be nice.