Soooo... Shadowbringers Monk

[Shurrikhan]

Frankly Monk's potencies are so low and greased lightning's duration is so short that having Form Shift reset the GL timer really doesn't break anything. It just puts Monk's fight flexibility on par with Black Mage, which can do that exact same thing with Enochian/Astral Fire and Transpose. Upkeep for them is more difficult during the fight proper granted, but they aren't absolutely shafted or need 6 niche skills to keep it up. It's even something they have as soon as they get Enochian.

As someone who enjoys both BLM and MNK... I'd honestly prefer neither get such a cheap gimmick solution.