because these new operations require healers to be busy all the time. So much so that dps (with combat rez) are now being asked to help out. And honestly? they should help out in that sense.
Let's say your group composition is a shadow dps, 2 slingers, and tactics vg.
Healers die, it's a wipe because no one can rez no one.
Group composition 1 sent 1 guardian 1 slinger 1 vg
Healer die...wipe because...you know
and so on and so forth.
I'm just saying as the level of difficulty increases there should be a level of flexibility for players as well.