So it's not just 5 skills pre-based but 7, the 6th healing and the 7th an Elite which means that from the huge possibility of 7 skills to make your unique build as it is in GW1 now you have just 3 skills to arrange and combine with the Elite !!! So I think that all the players will have less options to make a certain unique build which satisfy them.
Really don't know what are you thinking and how you have seen it working but already you have said that will be no second profession and now that will be only 3 skills fixed by the player for me that means Less Flexibility. I wonder how the players could combine 3 skills and an Elite to make a great build as Invisible Monk or Shadow Form or other great builds in GW1. Perhaps you believe that the freedom of choice to make such builds must be reduced as you have done by nerfing such builds in GW1, or perhaps you think that is a good way to give a push to players to work together.
So perhaps is better to consider that this flexibility was one of the greater success which made people love GW1 and if the whole game gives a push in the team working without the players loosing time waiting hours to make a mission or a quest then skill bar should have more freedom.