pretty sure not giving the wolves bane doesn't do anything later on, just gives you a "likes you less" thing and or makes them lose like you gained. only way to cut off the routes would be getting the black heart as far as I know. if you wanna be safe, just give them it after reloading a save, but I'm pretty sure your good.
and no. it's been asked a lot but it would take.... a while to update everything. maybe after the game is completed as a DLC or something but currently no it is not planned from what we fans are aware of.