Make Physical Levels into a Merit Point System
I think the biggest and best innovation that FFXIV has brought to MMOs is the idea of horizontal growth. Physical levels were the best indication of approximate horizontal growth we've had. I would like to see the level cap raised or removed. It should be harder to raise your physical level. Then I would like to see Physical levels used to give a very small standard bonus to a character. These small bonuses would only apply to R50 jobs or classes. Basically you could make your R50 character slightly stronger by increasing your physical level.