It would be nice to have some kind of upgrade that pulls obol and weapon drops towards me so I don't have to manually pick them up.

There is a lot of obol drops, it's pretty easy to get them in just about every room, that means ~4 more pickups to grab in every room. Having them approach you automatically like magneto does would alleviate this. You could also skip the magnetization entirely and automatically collect obols and weapons whenever they drop.