Thank you for the information,
I was thinking using the internal compressor and the wah of the kemper. I think both are excellent.
and then all drives and some modulation via the vst's before the amp. Tons of vst's for these options.
slot A compressor
slot B wah
slot C effects loop PC/vsts's
slot D open for anything
Kemper Delays, Reverbs, some modulation effects after the amp, But you can also use vst effects after the amp without an effects loop.
Just shut off the effects after the amp in the Kemper. My guess is this will dramatically help any latency.
In my mind the best place for the the loop primarily is after the input and before the amp.
Note: My Kemper rack is for studio use.
I don't think anything like this is feasible for someone gigging , Its more of experimental thing for creating sounds in a studio setting.
Will be trying this over the weekend when I have more time to mess with it.