It would be nice if we could run a couple more delays, but that is not possible (unless you use an external effect too). His sound is more about the effects filling space, you do not need much of the effect.
Here are the effects and settings I use for a Pat Metheny sound. I play a Gibson ES-175, or Ibanez PM20, both with flat wound strings.
Rig: (you could use a JC120 if you like)
/13 JRT9/15 (MBritt)
Air Chorus depth 1.9, Crossover 1335 Hz
Free Delay, mix 3.3, Time 453ms, Ratio 4.4, Feedback 4.7, Bandwidth 1.3, Center Freq -2.5, Modulation 2.5
ducking and volume 0
Reverb Hall, mix 13.4, balance 0, time 0.8, damping 5.4, pre delay 81ms, bandwidth 2, Frequency -1.5,
ducking 0, volume -1.1
Eq your amp as needed, enjoy
I don't found any "free delay" with that options on kemper, could you be more specific on this?