Of course I'd play a WoW 2.  I played the first one since launch and stopped when TOR was released and my guild went there.  We cleared the last WoW raid anyway so there's nothing to do(and still there's nothing to do).

I'm a raider, and I don't know of a game that does raids better than WoW.  I like approaching a new boss and figuring the fight out until it's down to a science.  I think that's why I love the Mega Man series so much, it's the same sort of thing.  Granted raiding now is nowhere near as good as it used to be, boss fights used to be hard.  I'm one of those oddballs that enjoys spending weeks on one particular boss, the gratification of getting a kill out of something like that is one I've rarely felt in gaming(plus it helps sharing that with other people on Vent).  I think killing C'thun was the peak of raiding for me.  Huhuran wasn't a bad kill either, we spent quite a bit of time on that one.

In terms of taking the storytelling of BioWare games... I'd be in favor of that.  It doesn't have to grossly limit the game world and the people in it just to put that in, WoW has phasing and that works just fine.  I'm one of those people that doesn't bother reading any of the quest text, and I'd sit there in raids sometimes and hear people talk about the lore of the game and I'm sitting there going "Jesus who cares?".  Part of that for me is not having played the RTS games but part of that is also the unfriendly presentation of the game world and its characters in WoW.

Voice acting is a double-edged sword though, you have to be able to guarantee that you can get the same voice actors to come back and put in new lines.  If WoW was fully voiced... well put it this way, Thrall's been a major part of WoW since launch and they should have the same voice actor throughout for consistency's sake.  8 years of commitment is a lot to ask out of anyone.  That's where I applaud the Mass Effect series, voices have been consistent with characters, and the first game came out in 2007... but you start to see the effect voice acting has on DLC/patched content when suddenly all major characters other than the main character have a lot less to say.

Maybe. Depends.

If nothing was really updated besides graphics and storytelling then probably not. If they added some other things to the game and still had the type of dungeons that were present in the game then I might consider it. Would all depend on what the game had available.

I don't see storytelling as a plus really if it is done to the extent BW did. That was simply overkill and took away from the potential strength and value it could have added. Not to mention I personally think due to them feeling they had to develop so many stories even for your basic quests that it ended up taking away some creativity and development for the main story lines.