Unfortunately I think they difficult to model in the Fractal ecosystem because they are solid state. Everything in Fractal is tuned around tube amps, the modelling, the amp design, the speaker interactions. Solid state amps even drive speakers differently than tube amps. The Drive pedals accurately model the solid state behaviours, but that's not the same as building solid state versions of every part of the amp block.
The Jazz Chorus is the exception. Because it's a very linear clean amp, I assume that a lot of the tube "quirks" can be tuned out in the model leaving it acting like a clean solid state amp.
That said, there's lot of things you can do to also make a tube amp react more immediately like reducing sag, etc. But a lot of that is about feel, not so much tone. For tone you'll get a lot of mileage out of doing what Dime did: boosting the front of the amp with multiple EQs to give you that angry cocked wah sound, then cutting some mids back out with the amp EQ. I used an EQ block then a PEQ then the amp bllock EQ moved to be on the input and got good results with the FAS Modern.
