I totally agree with this. I never felt like any of the skills or talents I was gaining on my Sage were interesting or good in the slightest. It's got that old WoW thing where most of the talents are marginal % boosts to damage or healing and none of them have any real mechanics to them. At least in WoW most of the trees have pivotal talents that come to define how you play the class and you really look forward to acquiring them. Past about level 15 I had pretty much every skill of note and I wasn't looking forward to any other skills or talents for the next 35 levels. It's bad design when you don't get excited for your character's progression.
That's weird from a healing perspective, at least. All of the healing classes are pretty much defined by the skills they gain from their talent trees.