Would love to see the Fat Channel take some inspiration from the Scheps Omni Channel.
I really like the fact that the Omni has an inbuilt Saturation section and every section can be set to Stereo, Dual Mono or Mid/Side. The Saturation module could also be modular like the EQ and Compressor section and select from various Tape, Preamp or console saturations or perhaps distortion instead. Specific DeEsser inbuilt is great, along with Soloing individual bands of EQ and Mix knob on the compressor section. I like the monitoring section at the end of the chain and being able to insert another module in the chain is wonderful too - except I think Presonus would perhaps have the added bonus of adding not just another Fat channel insert (why limit it to one?), but perhaps any other VST if it's running inside Studio One. (Maybe this is a little like the Sonar ProChannel??)
I see that if Presonus implemented these, it would be a true Swiss army knife that could keep being expanded upon in the future.