Ah, yeah that's true. Just generally I have always been told to go with power and alacrity then surge and crit and doing so I've only had trouble healing when the tank can't keep aggro so I have to heal myself instead of him.
Yeah if you don't use the procs properly, then power and surge is the way to go. If you know how to use them well, you can actually heal a lot better with a bit more crit (like 27-28%).
For my dps I always go with power/surge as well.
But to be honest, you can stack almost anything and still be a good healer (except maybe for 55NiM ops), it all depends on your skill, your reaction time and how well you can manage energy. Dps would probably need to max out the right stats to beat the enrage on 55 HM ops.