Just my 2c on the 9 vs 9.2, which is a bit OT, but germane in terms of understanding the 9.2:
I have and gig both an S9 and an SM12. The S9 has one band of parametric mid control and the tube channel; the SM12, which has a similar front end to the SM9.2, has both the FET and Tube channels and two bands of parametric mids.
My experience, and YMMV, is that the tube vs FET has a non-zero, but really small influence on the tone IF you run the input gain clean. If you use distortion, then the tube will behave differently. Obviously, if you favor FET, then you are going to be running clean; and in that case, I find negligible difference. Not begrudging anyone their prefs, but that's what I find. Regarding the parametric controls, the S9 has nearly the equivalent of the lower mid control on the SM and that is where the honk in the 700Hz to 1kHz lives. So, again IMO, either front end allows the capability to cut honk in various cabs. The upper mid control on the SM honestly remains a mystery to me, and I just run it flat. It MAY be useful for tailoring the treble, but I find the treble control to be sufficient. So, for my purposes both front ends are equally useful, and I get nothing more out of the SM than the S.
The real advantage of the SM12 for me is being able to drive two 4 ohm cabs. I suppose 2 S9's could do the same thing.
Anyhow, the Streamliner is a significant departure. A real tone modularity system to me would be to have a Streamliner and an S9, and then feed the pre out from one into the power section of the other to drive two 4 ohm cabs and get whichever tone pallet I was after. But, that's just me.