The reason we went with heal skills first is that we actually believe this is the highest impact area for build diversity.
1) it is a small pool to begin with so adding to it increases choice by a large %
2) it sees a lot of use
3) it heals you which is pretty important
As time goes on we will also introduce traits, utilities, elites, and potentially other stuff.
Jon
In GW1, choosing your elite skill was the hardest decision in the game because there were so many of them and they were all great. It was a lot of fun to see what kind of synergy you could get out of your elite skill. In GW2, the elite skill is almost chosen for you.
There is only 3 of them for each class and many are completely situational. This removes the element of surprise in any pvp sections of the game and eliminates the difficult decision making process that came with an elite skill
I hope the next time new skills are developed, many new and original elite skills are created first.