As of now, all leveling up does is increase your health and mana by the amount that you gain per level. However, due to the high burst damage and poke in the game, I think that you should restore all of your health and maybe even mana after leveling up. This would encourage more plays to be fought around the concept of leveling up, and would help against heavy poke lanes.
What do you guys think? Would this be a good change for the game?