I can't even remember who was a part of that band; I just know that the band he has now is aces and I am in favor of playing and releasing anything that hasn't been played since Bill and Eric joined. Their presence will make any song better.
IIRC, the Testimony 2 Live Band was mostly the same as the Testimony (1) Live Band, which saw 2 releases from its tour (the live DVD from Tilburg, I think, and an Inner Circle show from LA). It might have swapped out a couple of members, or added a couple more, but it was mostly the same, and I think Neal did that for continuity between T1 and T2, which was neat.
But I mostly agree with you Kev - I've enjoyed the fact that the band with Eric and Bill has been going through Neal's solo-prog-catalog with the Morsefests, so we are getting definitive live versions of his albums with this line-up, which is amazing, though I'm still miffed that we probably won't get live versions of "Absolute Beginner" (which should've been played last year) and "Back To The Garden" (from One, which should've been played in 2014), as well as "Doomsday Destiny" (which now has the honor of being the only song from TGE not played live, AFAIK, though if it has, it's not been released). Then there's the majority of Lifeline, though I think many of us probably won't miss it if The Neal Morse Band never plays those songs again.
The question is, will the NMB do a complete run of the Momentum album in an upcoming Morsefest? Technically speaking, Bill and Eric were a part of the band on the Momentum Tour, but they never played "Freak" and "Smoke And Mirrors", so a whole album performance wouldn't be unwelcome, though I would wonder what the 2nd night of that Morsefest would entail... A complete performance of The Grand Experiment (despite having released 7 out of 8 songs from that album with the current line-up)?
-Marc.