I feel this thread is really open to some not so constructive discussions, the OP has a good way for people to utilize the lightwell but unfortunately I don't think many want the extra clicks in their rotation. In all honesty considering the easy nature that people can click the lightwell with out undoing their current target I don't see a major need for a macro such as this, if people want to click the lightwell they will but if they don't and they die and the light well was down then all I say is "Too bad, learn to click the lightwell and you'd be fine".
Clicking the lightwell isn't a matter of HPS, throw that saying out the door, clicking the lightwell is a matter of raid survivability, your DPS just needs to get use to the lightwell and when to use it. If your light well is in a prime spot that's easy for everyone to use then no excuses, my tanks use it, my DPS use it on our Ragnaros fight because it's helpful on P1 and P2, if I can get it to them on P3 then they use it all up.
---------- Post added 2011-09-15 at 05:48 AM ----------
Really.. Maybe I'm misreading this but there is more to a holy priest than just lightwell, lightwell is a fraction of our healing which if DPS/tanks/other healers use it is a great tool for survivability, saying don't group with Holy Priest is a childish mentality that would make people say "crap holy priest... /leavegroup or vote kick" it's an absurd mentality and I would appreciate that you maybe come up with a more intellectual conclusive thought process then that.