Care to share any one of those ways, with enough detail to form judgements such as, "that works," "that doesn't work," "I don't like that kind of mechanic," "that's a cool new ability," so on and so forth -- something enough to have a good faith discussion/debate over? (I mean, I can think of at least one way, but it's so atrociously bad that to put it forth would be to stand up a man made of straw.)
There are more than a few examples floating around these forums of how healer DPS kits might be made more engaging. There are at least a few ideas floating around these forums on how to make healing more required.
But all healing, all the time? Crickets. Nothing. The proof is in the pudding, except no one can seemingly offer any pudding, or even something that might aspire to be pudding one day.