Paladin doesn't need more aggro or survivability though, it just needs buttons to hit while it's not actively tanking (Or after aggro/debuff has been established) because that's what it currently doesn't have.
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BLM: a fun, but useless spell; similar to how it is in other FF gamesgames. Hopefully they'll have spells of all the elements. Doesn't seem fair that NIN can have all six yet BLM is limited to 3 but mostly 1
SMN: Gravity (might be a bit OP though) a poison ground based ale dot
I will lose all hope if they still won't add haste/ en- element as a usable skill. Enemies can use it, its in the game so they better do it in 3.0 lol.
Blm could use burst and something like transpose II which does what transpose does but you get 3 stacks instead of 1 with a bigger CD
Just off the top of my head:
Warrior:
Rampage (obviously needs to be tweaked to suit 3.0)
War Cry - AoE 3 sec stun 150 potency. Increased Enmity. 30 sec cd.
Enhanced Berserk II - No longer pacified upon effect ending.
Paladin:
Holy Succor
Divine Veil
* these would need to be on long cool downs to avoid spamming.
Deflect - Take all magical damage intended for another party member. Can only be used when member is closer than 10 yalms. 12 secs duration. 180 sec cd.
Paladins need auras as a permanent switchable party buff
Say
Devotion Aura - Increase the parties defence
Resistance Aura - Increase the parties magic defence
Retribution Aura - Holy damage to any enemy that strikes a party member
Concentration Aura - All party members lose 35% less casting time when damaged.
I am always trying to find more efficient ways to set up my cross hotbars. There is always fat that can be trimmed to streamline them. There are also a lot of ways to open up new bars without slowing you down. I know Scholar/Summoner are two of the more complicated setups for a controller UI, but it is definitely possible to compress it down to not needing to actually switch bars with R1.
As for new skills. I'd love to see the ancient fourth Mudra for Ninjas. That would open up so many new Ninjutsu spells.