Healer LB is really....underwhelming.

[CycLee]

(...)but let's be honest, has healer LB ever actually saved anyone from a wipe?(...)

yes it did and it was part of several tactics in the past.

But the Tank LB and the healer LB are kind of gamechanger if anything went wrong or is about to get realy nasty, while the DPS-LB is for the standard situation.