I have the 8200 MK3 and use it often, especially for VHF UHF air. I have been using the IC-R-30 for about a week. The R-30 stays right with the very sensitive 8200 MK3 in air bands VHF and UHF. I've been surprised how much the IC-R30 pulls in just using the telescoping antenna.
I haven't seen any frequencies or ranges missed by the R-30 that the MK3 receives either on my discone or the Diamond RH77 antennas, telescoping etc with the R-30 having P25, NXDN etc of course.
I haven't had time on HF, shortwave yet with them running side by side yet but will soon.
The display on my IC-R30 has a dark area at the bottom but replacement on the way so hopefully it's just this unit. I expected the display to be a bit better overall with better resolution and visibility but still very impressed and pleased with the IC-R30 performance.