As for gameplay:

GNB: Feels like a DPS with some tank abilities. Highest damage simplest rotation.
WAR: Pretty much the same as Stormblood. Best sustainability, high satisfaction.
PLD: Also feels similar to SB, the choice to either dps or defend is there more so than the rest of the tanks. Best mitigation and can heal.
DRK: Way more simple now, dark arts is no longer an active thing. Resource management remains. Worst at everything lol but the cool factor remains.

Arguably its easier for WAR and PLD to MT.