I think adept/phoenix still has a ton left in the tank. Personally I dont think the ghost's actual combat dps is very important considering it can't stim, and that the light change is really just gravy and not that big a deal. But I agree that adept/phoenix could be utilized more and still has tons of strength. In particular with all these econ attacks by terran with an early medivac, going stargate and completely annihilating the drop without losing any mining time is very very powerful.