Again, i'm not saying the WHM was even decent. I'm just pointing out some issues that were not exclusively their fault. Being new shouldn't mean the AST was exempt from anything. I'm sure the WHM didn't sign up to solo heal when theres another healer. Copied Factory isn't that difficult to the point where they would be dying constantly. It just requires situational awareness.
A medica 2 after a raidwide should be more than sufficient to keep everyone fine for a while unless theres another one coming up. And again, there's another healer to finish up the top offs if needed. If swiftcast is coming off cooldown, it may be better to do some damage and wait for it instead of just hard raising everyone you see. Or as there was apparently a RDM in the party let them spend 1 GCD resing instead of them losing 4. Also, if the AST was dying a lot, they may have thought they weren't worth the raise.
No excuse for the LB thing but, like I said, I never said they were good.