My feelings about the Specialist system are that it's an irritation but one I can live with.
Having levelled all my crafters to 50, continuing as an omni-crafter in HW and SB made more sense to me than just limiting myself to three classes.
For a system like this to be attractive, I think it needs to start a lot earlier, say around level 20-30. Since I like being able to craft everything in the game, the locked recipes are annoying, but now it's easier to acquire and swap soulstones, I can plan ahead and get round this without resorting to an alt.
I don't think the system really helps people who don't want to level all the crafting classes. The specialist actions are too unreliable and you need to choose your class(es) carefully or you may end up very few recipes compared to others.
So, in conclusion I don't think Specialisation works, but I doubt it's going away.
Personally, I hope it stays much the same as it is now: i.e. relatively easy to get round and ignore.