I kinda like the energy suit, but a few things i would change:
-Defense from this suit is worse than nano suit (Not much, like 0.75x the def of the nano)
-Only energy crystals in your hotbar are elegible to recharge your suit/tools, rationale being that when an item is in the hotbar its because you have it somewhere nearby like a pocket in your suit, and not in some weird infinite space limbo.
+1 Seriously though, I think it would be really cool to have side-grade type armor. I don't like "Clear" choices (As in, there is one choice that is clearly superior) and wish there were more specialized products.