The only reason I enjoy top tree dawnblade is because its the perfect counter to grenade launchers and the perfect counter to stasis. The air dodge is nice but honestly top tree dawn would still be a viable choice even without icarus dash just because of its ability to fire from the air and having no in air accuracy penalties. Icarus dash could be completely removed from the game and I would still play the subclass because of its ability to dodge a crap ton of BS and being able to snipe from certain angles on elimination type modes. Icarus dash is honestly a bit too much for me, the class can do just fine without it. If players hate it so much then bungie can make an exotic that grants warlocks icarus dash, (basically twilight garrison but on warlocks). I actually like the dive that bottom tree dawn does while granting health on the way down over icarus dash. A class thats designed to be in the air and being able to instantly dive down towards the ground is more balanced to me than how top tree dawn currently is with icarus dash.