One thing I really want to see in FFXIV is lv caps, to go along with this I also want to see a Company Seal Reward for doing content again. Work it out to 1000s per 10 min caravan, these fights are usually 20-30 min cap so 1k seals for repeating old content seems good to me for assisting others.

To me having a lv 50 leave the group, kill everything and you still get XP is HORRIBLY broken. FFXI had PLing to a degree that worked like Arkine says, it was to a level where you could be PL'd and it would boost your leveling speed, but not be insane like it is in ffxiv