bosk,
There was no official announcement he left Queensryche until early 1998. The band, however, knew Fall 1997. They played their last dates in South American in December 1997, knowing those were Chris' final shows.
re: Tribe
The album is, after almost 20 years, hit and miss. I think the DeGarmo-involved/recorded tracks (Open, Desert Dance, Falling Behind, Doin' Fine, Art of Life and later, Justified) are good, and continue that evolution from where he was on HITNF as a writer. Art of Life and Falling Behind have really stood the test of time for me.
The non-DeGarmo-involved tracks, Tribe, Losing Myself, Rhythm of Hope, Blood, and The Great Divide are also pretty good, with the exception of Losing Myself, which is for my money, one of the worst songs with Queensryche's name on it (co-written by Mike Stone/Geoff Tate). Blood is unfinished -- it's missing a second guitar part that DeGarmo was going to add. The Great Divide was also unfinished, missing a solo, which Wilton added on the Tribe headline tour. I like that song. The title track is great, and Rhythm of Hope is pretty good too.
Overall, I like it. But I tend to split the album, as I feel the DeGarmo tracks really sound like one band, and the other tracks sound like another. But that's just me.
re: Tribe tour
I saw the tour (which went through Fall 2003) five times. Twice as a co-headliner with Dream Theater (both Northern California dates), and then three times as a headliner (Cupertino, Ventura, which are in California, and then Westbury, which is on Long Island). I thoroughly enjoyed the tour. The Westbury date in particular was great. 20+ songs, they played a lot of my favorites, and in soundcheck they played Anybody Listening, which was the first time I had seen personally seen it performed. They had really started branching out on that headline run, adding various songs into the set list. Della Brown was at that show too, which was cool.
re: HITNF
The album has really grown on me over time. It still has a lot of filler, but I'd probably argue it is a real good 8-track deep album. I've really come to appreciate just how DeGarmo was evolving as a writer on it, and all the guitar ear candy. It's just not guitar in a classic metal sense. And that's okay.
I wrote a little something back in October about the similarities I hear between Hear in the Now Frontier and Soundgarden's Down on the Upside. Check it out here -
https://anybodylistening.net/downontherycheside.html