Well, I'm glad everyone is giving their inputs and critiquing their own ideas. Not very often someone will suggest something for their character, then have comments and ideas suggested and they flip out or get defensive. Nice to see everyone being calm and open to alterations and even negative side effects.

Anyways, I do agree that gluttony will have a lot of draw backs as you are suggesting. Maybe his ability should be being able to eat anything and then spit it back out like a cannon? Anyways, having to eat a lot to maintain his energy and having to "purge his waste" makes sense for draw backs.

And thanks for the chime on greed vs envy. So maybe envy's ability should instead being able to copy another's skills? Like upon touching someone if the person touch is an expert in martial arts then envy can touch them and do what they do for a limited time. With special ability users envy could use a weaker version of their power as well.

We can leave greed with the ability to steal objects as long as he knows them, and upon discarding them they are gone forever maybe?

These are just suggestions, not forcing anyone into anything.