They better significantly change Gazlowe then since Probius is better than him in virtually every way. The talent to have cannons see stealthed, fire over obstacles, and do so at a 25% increased damage is insanely powerful.
Gazlowe should have always been like Tinker from dota 2. Remove his turrets entirely, give him a rocket barrage attack in addition to his laser and bomb. Ultimates are fine.