IDK why Flamethrower hasn't been changed yet. Wildfire being an AoE like in PvP would be nice (possibly 25% falloff damage like Standard Step) and Iron Jaws would be less awkward to use as an oGCD.

Although Bioblaster is much more niche than Drill, it would just turn into another Shadow Fang if it had its own cooldown. If it at least interacted with Flamethrower in some way, that would benefit both skills.