I Miss Cross-Class Skills
First off...this isn't a petition to bring them back. I understand why they're gone, and for new players, it actually makes sense to have role actions that make the game easier for them to learn, etc. It's a lot easier to have all tanks learn 'Rampart' at lv8 rather than needing to specifically level up GLD for it, for example, and it's certainly a QoL improvement to not need to level CNJ so your PLD could use Stoneskin (although I do miss stoneskin, it was cool).
Rather...I just remember it being really neat how we had them, and am slightly nostalgic for them.
(Or, if you're not a person who's been around forever, consider this an older gamer going 'I loved many parts of this game even back in 2.0'.)