I think this is a misunderstanding of the problem groups were having. Groups understood and executed on the mechanics very quickly. The problem is that if the group didn't have strong dps to bring down the boss fast they would get overwhelmed and fail.
That is still the case, but in general dps is much better and especially the low end of single-target dps. The quest is very easy to complete with high dps and much harder without it. Now the boss is down in seconds the final time it comes up so the mechanics causing pug groups to fail aren't even seen any more except on higher difficulties.