I settled on a 5Ghz Rates profile that lists HT Supported Rates from 0 - 23 ( i.e. 1 - 3 Spatial Streams ) and have not selected any VHT Basic/Supported rates for this profile, therefore excluding them (i think). I'm not sure if its the implementation of VHT profiles with Mikrotik or if I'm overlook...

Hey, I stumbled across this issue as well, where capsman controlled ap's never allowed/enabled client connections for more than 1 spatial stream on 5Ghz ac, using 80Mhz band. Resulting in max 433mbit , never reaching potential higher speeds. I believe this is due to VHT MCS rates vs HT MCS rates. Us...