I've thought about this a lot more and think the damage dealt to and from enemies is good. It could use a few tweaks, but it's good. I wouldn't want to be patrolling earth and be too op. it would get boring. more so than it already is. That said, even if I had an exotic in every slot, I still wouldn't be op, but it would be more fun because I could use all my favorite gear. The exotics really aren't all that special, but we are supposed to think they are. Allowing only 2 makes them "feel" special and so they are.