Originally Posted by
Kalisandra
That's because while Haste cuts most cooldowns down, it also reduces the GCD by the same amount. Thus all Haste does in compress the exact same rotation, gaps and all, into a smaller time period. Thus while the gaps are shorter, they occur more often, for the same overall downtime.
This does mean that the gaps aren't as long, which should feel a little better, though until you have something like 25-30% Haste this won't change the feel much. From what I've seen of gear and stats in the beta, we won't see that much Haste for some time.