Your wish is my command 
One thing to add, booting with my Friday night image including bridge-mgr had 200 MB free, then just leaving it overnight about 12 hours later it was down to 80 MB free. Booted last night from the current build, and by the morning again it was down to 80 MB. I'm not sure if this is just the Ath11k memory leak, as I haven't paid much attention to that yet, or if bridge-mgr is also introducing a memory leak as well...
I've just rmmod ath11k_ahb & ath11k after a reboot, free went up from 195M to 288M after removing ath11k_ahb. I'll leave it be now and see if the memory is stable or not.
8 hours later 288M free still so I guess no memory leak here.