Bandages are pro!
I know that morchock is relatively easy, but since it is a much harder fight on 10 than on 25 for heroic (if you 2 or 3 heal), I required my melee dps to bandage themselves every black blood of the earth. On Heroic Hagara lightning phase bandaging is appropriate. On spine it would work too, since your dps have effective down time during rolls (although havn't done this, and would only be a single tick).
Firelands had 2 fights with bandaging for at least melee dps (rag and alysrazor), and BWD had 2 also (nef phase 2 and atramedes air phase) where bandaging was zero dps loss and no risk to the tank. Its not the end of the world, but there were 6 fights this expansion (7 i guess if you count 1 tick on spine) where bandaging is just a throughput increase. Throughput is good, and while its not the end of the world, bandages are worth using in PVE.