I worry that surfaces will be trivialized if the source point cost for bless is removed.
Do this: download the source free bless mod, and play a bit with it. It makes Bless something you use instead of something you... don't. Blessed surfaces are a thing you can think about doing instead of something that literally never happen. I know why they added the source cost, because it was sort of a "why not cast this," but with the source point cost it's never used.
Honestly the bigger problem with surfaces is how armor works so you don't have to worry about getting stunned or lighting on fire if you run into those things. Blessing a surface changes ALL of that surface, and often times it's better to be standing in fire that hurts you and all the bad guys instead of blessing it and making it good for everyone.
