I don’t want dual spec. I don’t know if it’s good or bad for the game or what Blizzard is going to do, and I’m not going to speak for anyone else, just that I don’t want it.
The only facet of the game I interact with anymore is raiding and everything else I do is a means to that end. Dual spec makes players stronger thereby indirectly making raids easier and even if I don’t personally use it, other players in my raid could and probably will. The raids are already on the cusp of being too easy and so while I might not unsub directly because of dual spec, if the subsequent raiding scene becomes too easy it may just cause me to stop paying and playing.
However, simply making the spec switch only accessible from the class trainers is enough to address that issue. As long as people can’t switch mid-raid it doesn’t change the game enough for me to care.