Installed the new GuitarLab 3.0 and updated B3n to firmware to 2.0. Connected via USB and everything seemed to work without a hiccup. I noticed that I didn't need to MANUALLY install any of the new items (Ampeg B15 & Cab, 8x10+tweet, Glam Comp, etc.) as they appeared in the drop-down list for the slot effect TYPE. Not sure whether this was in the new firmware, or whether GuitarLab did this by itself, or in some sort of automated fashion. I also didn't dig into trying to add or remove effects from the unit, and I'm hoping this is still a feature.
As for the new sounds, the FlipTop & companion cabinet sound just as I expected. The FlipTop and SVT can sound awfully similar through the same cabinet sim, so IMO the 15" cabinet sim actually has more impact to the sound than the amp/preamp FlipTop vs. SVT. JMO.
It's great to have the new Hi EQ, which has a Low Pass setting w/variable frequency. Between it and the Lo EQ (hi pass), you can pre/post treat your signal at the extremes of the frequency spectrum as desired. Nice.
The Glam Comp is cool, mainly due to the Dry Blend parameter. Interestingly, you have a level for the compressed sound, and a discrete level for the Dry Mix blend. The SHAPE parameter seems to highlight different parts of the EQ spectrum (full clockwise is really bass heavy). Generally, I find most of the comps in the B3n to be of the "a little goes a long way" variety, but you can get some pretty good sounds using this compressor. I like it.
Overall, this was a solid effort from Zoom IMO.