pawsplay
Hero
I think you can blame SWSE (that is, the game that many people say they wish 4e was more like...) for the second wind mechanic, rather than particular moves restricted to a handful of characters in fighting games.
I don't agree that the mechanic weakens the need for a balanced party, or at least not any moreso than UMD + healing scrolls & wands does in 3e.
Actually, Unearthed Arcana introduced Reserve Points first. And here's a little secret: Reserve Points, Healing Surges and the like are all just hit points in disguise.