I'm assuming you've been away since before 2.0 if you've now noticed the change in the talent trees.
If you weren't, then I apologize in advance and ignore the next paragraph!
But If you were, you will notice that several skills have changed both in location on the tree and in effect. Although Revivication is now harder to reach than before (needing more points to reach there), Many of the new skills are quite useful and many of the previous skills have been improved/streamlined to your needs as a healer. Although you do miss out on your previous loadout choices (And I do sympathize with that, btw), it really doesn't matter so much when you've got all these new traits/talents to make the most of. So really, Its really not so bad from a lvl50 perspective: you've just got a different skill set to utilize, is all.
I get where you're going with the whole "BW favors the paying players" but tbbh, what do you think paying players expect from an expansion? Usually, its new locations and new gear and (unfortunately for BW) that alone won't necessarily provide the driving force to persuade people to buy it.
So, what do you do? Well...you raise the level cap.
But by raising the level cap, those players need to feel special, as if those levels MATTER beyond just allowing new gear to be equipped. That's where the extra skill points come in. Those players who have paid (remember, they spend more money to enable them to do this: you haven't) will be able to spend the extra 5 points to acquire those extra skills. Although they would now have a considerable advantage over you, they'll be in a world of their own, in a seperate WZ bracket, doing different Ops, so you won't need to worry about being overshadowed by them.
Besides, you shouldn't worry about them so much. You only look like a "Weaker Healer" in the eyes of lvl55s and that's it. As far as everyone else is concerned, you've still got what it takes to do your job well in Fp/Wz/Ops and, really, that's all that matters, right?