I really enjoy 99% of this, but I do have some feedback about the blasphemy powers personally. If you’ll listen to my two cents for feedback, then thanks. And if you don’t, good for you, this isn’t my game after all.
RADIANCE’s delays are an interesting concept however IMO Ardence is the worst blasphemy in the base game, and this being WORSE is definitely something that you might want to rework. Maybe just wave radiation in general like microwaves, radio waves, or other forms of emissions? P.S. the name WAVE for a blasphemy is already taken by the Harpocrates dossier, but radiance is a good name anyway.
VAST’s COLOSSUS could use a slight nerf as you stated. Just having the talisman at CAT size and/or making it 1/mission would be useful. Or add a downside to repeated/spam use like “if used more than once per mission, take an injury.”
VISCERA is largely fine. Maybe swapping out one power to have some “detective” use would help, maybe seeing memories or emotions of something you consume a piece of, ie hair or blood?
PILGRIMAGE could have the passive’s sin restoration buffed from 1d3 to 1d3 + 1 to make it usually cancel itself out. Maybe rewarding a PSYCHE burst as well.
TEMPEST should have a way to increase the tragedy’s size consistently without slashing something’s execution talisman. Maybe you can grow it instead of gaining pathos when you would otherwise gain it?
Hope it helps, because I really like this great feeling set of additional powers!