I'd love to see a LVL, %exp, TSlvl, %tradeskillexp added in a reasonably small font below HP/power in the player window.
i.e.
Langedon
HP bar
Power bar
6 220% | 9 25%
(I'm a level 6 scout on IoR with 220% xp and a level 9 artisan with 25% artisan xp)
PS. These would be numeric readouts only, not a graphical bar.