On the plus side, these means that hopefully the current 3.1 talent builds are more or less set, so you don't have to worry too much about respecing based on major changes to class. On the other hand, if you don't like where your class or favorite talent tree is right now, you may be in trouble.
That said, Ghostcrawler hasn't ruled out further changes, and has all but said that there will probably be numbers adjustments. So what we can probably take from this is, at the least, that the basic mechanics and rotations for every class and talent spec are more or less set, at least until someone theorycrafts something different. This also hopefully means that they can focus on adding more content for us to use all our class mechanics on in future patches.
But for now, I hope you like what you have, because it may be all you're getting.