Why do I just get the feeling 'heroic scenarios' are going to just have every single mob using some cheap one shot mechanic you have to avoid or die - if that's not the case then will be pretty easy to take a tank or healer to make it a joke. Unless every mobs going to require an enrage timer forcing you to run 3 DPS.
I mean don't get me wrong I'd rather like the 3-man content as we normally have 3 people online, but maybe not 5; I'm just suspect of how Bliz intends to make the scenarios 'hard'. If it's just full of one shot mechanics it doesn't really sound that enjoyable.
Scenarios/heroics that scaled to group size would be more appealing to me, so we could just run it with whoever's online and wants to go.