This might be a weird change, but can you make it so that the druid's Freezing Gale is usable when morphed?
Poison Flash used to be blocked by morph too, but when that restriction was raised it allowed for an interesting Treewarden build (Wildfire/Poison Flash/Force of Nature) as well as giving Werewolves a leveling skill. Freezing Gale is a similar sort of point-blank AoE skill, with greater range but one that requires you not to move for it to work. I don't think it'd be OP to allow it to be usable under morph, and you could nerf the range further if needed. Plus it would be a way to differentiate it from the other elemental skills.