And none of these factors even take into account that only CON/THM can AoE their heals right now, which alone makes them far and away the only good choice for healing in a group. Sure, group members can all individually heal themselves or others... but then who's hitting the enemy?

And with regards to soloing... who cares what they can do when nobody else is even in the picture? Doesn't affect you at all.

Grouping needs to be able to stand on its own merits without resorting to gimping the ability to solo just to force people into groups. Make grouping straightforward, like Behests do, and the problem disappears. If forming groups takes no more time or effort then running solo, then everyone will be able to play in the way they truly enjoy, as they should.