Hi,
I had a samilar issue, I noticed my APs didn't have the correct transmit powers anymore after my upgrade. But client health seemed to be OK.
My min and max transmit powers were overwritten and I could enter a new min and max transmit power on my radio profile itself, and not on my ARM settings; it was not looking at the ones set on my ARM profile.
Now I have also installed a Mobility Master, so it is possible that it looks only to this value when you have Airmatch enabled, but for this you need a MM.
BTW: did you installed these 2 both in mode standalone? Then there is no config sync?
kr,