No, because I don't think there's a relationship between time to ship and the final product. Mostly, expansions last 2 years and they start before that at least for design so time is fine (unless you've hated the last like, 6 expansions). It's the design direction that's the issue and more time to develop won't help that.
AS for things like class fixes etc... they got feedback on that in alpha and beta and ignored it until mid expansion. Again, time to dev wasn't the issue, listening and reacting was.