Bard and Ninja were the ones I played the most, but since I cancelled before HW came out I haven't tried those 3 new classes yet. I'm hoping HW will go on sale or something when Stormblood comes out. IIRC WoW just straight up gives out the last expansion for free whenever they release a new one nowadays- maybe Yoshi can at least also ape that from WoW if he's going to ape everything else.
Anyway my big problem with XIV is still that having a "main class" means a lot less other than what you focus your loot collecting on when a lot of the classes only really feel superficially different. One of the first things people were discussing was how RDM would work as both a physical and magical damage dealer, and my only real reaction to that was "who cares", because I can think of pretty much just one instance in 2.x where there was any difference between physical and magical damage (BC Turn 4), and you could still brute force your way through that.
XIV trades away most of its RPG customization so they can have a consistent hand in balancing encounters in the game.