It's possible that the naming scheme for items is making them appear identical; regardless of what the bonus is, all offensive-slot items with one bonus are called "Armband of Might". Perhaps it would be more intuitive if I removed the "of Adjective" part of each name. I just didn't come up with a name for each ability, because at this point I would need 3 * (3 ^ 6) names.
When you equip something, it kicks you back to the main screen because equipping takes time, and monsters shouldn't be able to kill you while you're buried in your inventory screen.
I do get that more feedback would be helpful, though. It's the hardest thing for me as a programmer to see, because everything behaves the way I expect it to. Visual effects for ability ups and equipping are a good idea.
Thanks for all the great feedback!