I think variety is good.
I actually really like HC Scenarios, it is nice not to be stuck in the Holy Trinity Model, getting a group is really easy.
I think Scenarios actually have some fun and interesting mechanics and they are really good for story telling (better than 5 mans imo).
I really like "The Secrets Of Ragefire" and "Battle of the High Seas" for example.
I do not in any way shape of form want 5 mad to be removed though.
I do hope they make more in WoD than they did in MoP it is really my only criticism of MoP.