Going forward with the game moving on to more expansions, it feels like there needs to be changes made to how classes work when level synced, as the extremely limited move set presented to people at the lowest level dungeons is not particularly good.

I'm not sure exactly what things need to be done to make this work, but my feeling is to not worry so much about ability acquisition during the leveling up process and make it so players go out and complete quests to gain abilities. If players get to a point in the game where those abilities are necessary, they should get blocked by the content by simply not being able to continue. It sounds kind of harsh, but as long as there is some kind of indicator that tells them where to go to learn their next ability (like the archer guild or lancer guild), that would work far better than having a system where the abilities are unlocked via the job story quests, where it's easy for someone to just forget where the next quest starts.

Will lower level content be easier for players with abilities unlocked? Absolutely yes, but that is the whole point. It would also be nice to be able to unlock new looks for skills, such as Heavy shot and stone, and be able to use those looks at any level regardless of the skill. We unlock glare at level 73+, but then we have to use stone for the majority of content anyway.

I think it would be good to be able to have a ravana themed move set, with dark knight abilities that have the red butterfly glow, or have an Eden themed gravity move set for certain abilities from Astro and Summoner.