I will definitely play Specter when EoD release.
Even if I agree it took a big nerf with the changes since first beta and single target heal seems a big constraint for endgame group content such as raid, I will still play with Specter because the gameplay is refreshing compare to what we have on Thief currently. But I guess it's mainly because I play only Thief and in a very casual gameplay like open world content and casual WvW.
About the clunkiness of the gameplay some people are worried about, if I remember correctly deadeye was (and still is for some people) very clunky at PoF release.