@sjmcc13 Of course its not a normal heal. He won't be OP otherwise.
That being said, having a special type of "Mass Cure Wounds" that has additional effect like buffs, cures debuffs, range +, etc doesn't make him a "healer" if he also actively tanks and detect trap... both of which requires him to be at the frontlines. You even said that party needs a healer and a
tank to replace him.
If you are going to tank, the only person you would heal is usually yourself. Since you are going to tank, you would also stand in the frontlines focusing on your enemy. Not exactly a good spot for watching out for when your teammates get hurt.
Its like being Flynn Scifo from Tales of Vesperia. You have First Aid. Even if you upgraded that one First Aid spell to an AoE spell that can also heal status effects, would he become your healer? Nope. 90% of the time, Flynn would be slapping monsters with his sword while an actual healer does the dedicated healing.