Interesting read though I think they could've gone deeper. I remember all to well what happened with Sierra and how they handled T2. The game was buggy and some of the patches did more harm than good (they made the game worse for me at one point).
I also think Dynamix (or what was left of them) did a bad job of handling user feedback at the start. They were, to my knowledge, the first ones to have in game community support and of course you'll hear a lot of negativity on official forums/chat/etc. I remember all the shit about the rocket launcher, shocklance, etc. People just weren't used to having unique weapons (I actually liked that the rocket launcher couldn't 'dumb fire') and the game was too young at that point for users to realize the full potential.
As far as Vengeance, Chris Mahnken tries to blame the publisher for not letting them *finish* multiplayer. I think the problem was that it wasn't a priority in the first place. I think Vengeance was more of a novelty game in the Tribes universe rather than a full sequel. A full sequel should've been T2 with better graphics and netcode, with the original T1 speed (T2 Classic, etc.). Performance should've been the first priority since that's what plagued T2 the most. For me, Vengeance ran like shit; it ran worse than UT2k3 even though it was the same engine.