WOAH. HOLY *!@#5$%&!!! This is game-changing! This is incredible!!! I LOVE THIS IDEA! However, I have ONE concern... Hallow enemies drop souls of light, a necessity in the game. Without them, several items, (including boss summoning items) will be un-craft-able, and it would take an extremely long time for the mechanical bosses to spawn. However, I have a solution to that. Try making an alternative soul. It would complete this set, and amaze me further. I LOVE this idea, and your hard work paid off.
Check under items, It's called the Pride core
EDIT: The various other souls have been replaced by these "cores" as well