Playing the spec with only 2-3 traits unlocked is kitten, I wouldn’t have an issue with that when I’m still leveling because then it’s still character progression. By not raising the level cap it sends out the false impression that you’d be able to get the traitline from the start.
Even completely ignoring that, there should be other ways to unlock the traits beyond grinding away countless hours. Like a person here before said, spirit shards to hero points conversion sounds like a perfect idea or letting people buy them with gold.
Lastly, shameless plug for a post that passionately voices the concerns of many like in this thread.
http://creeptheprophet.be/index.php/2015/10/26/gw2-beta-bait-and-switch/