Machinist needs help.

[Seraphor]

I have no problem with standing still for 10s to channel a turret skill. The alternative is Spreadshot spam.
It's just like Phantom Flurry, one of BLU's best spells.

And sure, it's just for Dungeons and Alliance Raids, because you generally don't AoE at all in hard content. So it's perfectly fine to have a channelled turret skill in casual content, and it even serves as a welcome break from the constant jackhammering of your keyboard/controller for some.
I enjoy the change of pace it brings to dungeon pulls, and that it mixes up your tempo. That's also why I like Ninja.

If you're only doing 'hard' content, then why would you be at all concerned with Flamethrower?
"Just delete the stuff I personally don't use" yeah... no.