HUD Addition
It would be incredibly helpful to show a limited view of the 5 opponents on the HUD similar to the 5 icons for your team above the mini-map. I've noticed that you can right-click on these to target your teammates (great for heals and shield during a pile-up), but there's no way to target a specific enemy. This is incredibly discouraging for champions like Lulu
when you speed up an ally instead of polymorph an enemy.
Enemies not in view would have to be grayed-out since they could be stealthed or just in fog of war (so you shouldn't be able to target). Likewise, grayed-out enemies shouldn't have their health or mana showing.
Oh, and you should add polymorph, stealthed and mana to your dictionary.