i think op healers were kind of doomed from the start by sharing a class with the "burst stealther" archetype
you end up with extremely low utility - both offensive and defensive - and a punishing resource system to limit sustained output (TA, and energy to a lesser extent), in order to keep concealment from being OP, especially in PVP.
interrupts are bad for ops because the resource cost on our flash heal is stupid, so we're incredibly reliant on kolto injection, and can be locked down effortlessly by interrupting classes.