I think there's a couple of approaches here. A company like UAD really has done exceptional work modeling specific classic analog audio devices.... it's their entire business model for the most part. Helix pretty much does the same thing in that most (if not all) of the amps and pedals are specific models of analog pieces. After a while though, it makes it really hard for the user to be locked into the constraints of each device in the analog world. Then there's a company like FAB which has completely different tools and visuals for achieving the same effect.
To me, what fractal has done is strike a good balance between giving us analog models, coming up with their own (FAS) and giving us tools of virtual engineering and configuration not easily done in the physical world.
To compressors, there's basically 4 types: FET, Optical, Variable MU, and VCA. Most of those if not all are already represented in the compressor block as it stands.... they just doesn't have the same cache as saying a Distressor, Neve, LA2 or API for example. Not sure an entirely new unit is necessary, but perhaps in the evolution of Fractal products, new parameters could be introduced.
Sean Meredith-Jones