Posted 24 January 2010 - 11:12 AM
The whole skillcap in WoW is a pretty easy thing to analyze.
Basically, it comes down to the tools a class has.
For example, shamans have a very high skill cap, because:
1. they can interrupt enemy casts on a short cooldown.
2. they can heal teammates
3. they have to deal with totems
4. they can do damage
5. they have reactionary skills, like grounding totem
It's the combination of things you can do, how often you can do them, and who you can do them to.
On top of that, dealing with pets, and using their skills (devour magic) adds another layer of complexity - or number of possible decisions that increases the skillcap.
Using this mindset, shadowpriest does have a high skillcap. It's just that they don't have to make as many decisions as some other classes, also because of lack of spammable cc, which is Artenians point.
Now, the reason people argue is that wotlk screwed up the priorities. If you can global someone, there's no reason not to. If you can heal forever (old prot pala), then that's what you do. Skillcap is therefore skewed by Blizzard.
As for dpriest->spriest transition, this is logical. Dpriest is just a spriest with more healing. It still tries to do as much damage as possible, while keeping people alive. Apart from the talens you get by going into shadow tree, the mindset is actually pretty similar.