First I have to say that the Kemper is amazing for bass, and as a bass player that is the primary reason I bought it. I have downloaded a bunch of profiles of bass amps and everything works great and sounds amazing.
Some suggestions that would make it work even better for bass:
1. Provide an option in the tone stack to make the frequencies of the tone controls better suited for bass sounds. Make it somewhat tucked away so no guitarist would accidentally select it. This would want to be selected per rig, obviously not globally for the entire unit. Currently I use a post stomp with studio EQ and it works pretty well, but wastes a stomp, and not as convenient to access the controls.
2. Include a number of cabinets that are designed for bass guitar. I can use a post stomp with EQ to make guitar cabs work better for bass, but it would be easier to scroll through a selection of bass cabs. Maybe some of the existing cab settings could help? Still getting my feet wet.
3. Include a number of amps that are designed for bass guitar. But…all of the included amps sound good (to me) for bass with a little tweaking, so this one is less important for me.
-John