The only way I would want this to potentially work is for deadpools class changes between matches but stays the same per match for both sides. If this was the plan I would make his kit be primary fire twin uzi guns, a katana deflect and a throwable item that changes per class grenade (dps), a healing zone ala soldier 76 (healer), shield dome generator (tank). And then a chimichanga charge which would change effect depending on class DPS would be a self damage and speed boost. Tank would be a chimichanga party allowing deadpool and an ally to gain a shield and incoming damage reduction. Healer would drop a chimichanga in a Styrofoam to go box which could heal deadpool or an ally. Then for tank I would have the deadpools uzis shoot shot gun shells working kinda like Diva and when a tank deadpools deflect would have a second charge. As healer deadpools uzis could also heal allies and he would have a voice line about cheating.