I'll also echo some of the sentiment regarding Testimony, in that yes, it can be a BIT to preachy/praise-y at times, and it can drag on for a bit (but I've gotten used to long albums at this point in my prog-listening life - TFK's Unfold The Future is a breeze to me, and that's a MONSTER album), and there are a lot of repeated themes, but they're all still enjoyable to an extent. It's not his BEST album, but far from his worst. Paired with the sequel, the two make for a killer journey of Neal's life told through music, though I will agree, Testimony 2 stands above it, though I wish the ending hadn't been a fade-out, but I understand the sentiment behind it in context of the album.
Because I came in to enjoying Neal Morse around the time the ? album came out, his only post-SB solo albums were those first three - Testimony, One, and ?, and so all three got a LOT of spins and listens from me back in those days. At first, I shied away from Testimony BECAUSE of how preachy/praise-y it got, but enjoyed One and ? more because of the concept-album slant to it - sure, they're religious in nature, but when taken from a "this is a story set to music, and can be seen as a work of fiction like any great rock opera" mindset, I was able to enjoy them more, even with all the God and Jesus in there, but Testimony still took me awhile to break in to. I'd say around the time Sola Scriptura came out, I liked it more, but since then, especially since Testimony 2, I've grown to see more of it's slight flaws and weaknesses compared to later albums.
And yes, I definitely agree - the lack of a non-Neal guitarist and bassist do hurt the album a bit, but the two live performances (well, 3 if you count BOTH Testimony Tour shows from 2003 that were released, plus Morsefest 2014) REALLY amplify how good the music is with a huge band of 8 or 9 players, including a dedicated guitarist and bassist.
As an MP fan, when Testimony 2 was announced, I was REALLY excited to see what the first Post-DT album would be like for him, and I'd have to say, I really enjoyed his playing on that one. There's a lot of good grooves on T2, and the whole band seems to feel very tight on that one as well. Neal's been hitting them out of the park every since then, giving us four straight albums of amazing music! It'll be fun to see what the Neal Morse band will do next (though that probably won't come out until 2019...).
-Marc.