You get access to more abilities at higher level, obviously.

But as far as the current balance goes, it's really tough to say for a few reasons:

1) they are overhauling all actions of all combat classes in the next large patch. This means redistribution among classes, readjusting cooldown, mp/tp costs, effects, prerequisites.... We should hear more in the next few weeks regarding this.

2) combo system is making its way to the patch after the next one. Means you can basically combo moves together to create additional effects. How this will change the pacing of combat? Its hard to say. But it will alter the way the combat plays out.

Basically you dropped in the middle of huge changes so expect the status quo to shift significantly in the coming months.