Id love classic healing and tanking in the game, and yes heals can remove debuffs. That said, as kalielle points out perhaps the best use of heal is in fact its "cure" component. When mobs deal out damage as quickly and powerfully as they do, and tanks have so little HP (150 more hp at level 50 than at level 1), players can often die if they rely on heals in the 3 second cooldown time of the heal spell. Its an issue at not just for level 45s or 50s, but for all levels.

Yes, i've known some good healers who have made a difference, but i still would never rely on them, and i don't think its fair to expect more from a Enchantress than what i know the game itself allows them to be capable of.