I always felt eh to the mana thing with lucid dream because I just kept using it on cooldown (after a certain threshold), so unless people REAAAAAALLLLLLYYY did poorly I would effectively have infinite mana. I do think that resource management can be fun, and that could be unique to each job. We already have that in some sense with the gimmick resources, but mana is definitely, at this point, feeling like a vestigial outside of specific oopsies (use lucid, die, get revived, nice lol). Like if everyone is BLM with MP then.. we don't need MP, so have more fun with those resources such that they are meaningful.
I do miss support skills that were unique, and in general content I think it's fine, but good luck balancing that in balance sensitive content- which I think is the route they took (easy to balance, less likely to hear raiders bemoan). Personally I'm starting to lean to go more unique, YES there will be situations where you're like "we HAVE to have a Ninja" but also make gearing other jobs in those content even more reasonable, as well as some horizontal lite mechanics that can make up for some lacking elements, such that you will be playing more than one job or having more armor you'll be using for different situations (BiS isn't just one setup). There will be attempts to balance, still, but like if someone says "I want to have the same defensive skills as the Paladin against physical damage" or "I want the same magic defense as the dark knight" and SE goes "I'll make sure it isn't awful, but no- that's intentional" lol. Can also use that variety stat system they have to greater effect like it pools most commonly used vs least commonly and will add even further bonuses, so if no one is using MCH on a fight when you show up the bonus is even larger (this info will be made easily accessible).