I would say it’s worthwhile trying to:
- disable STP on all bridges (and hardware switch chip STP if enabled on certain models)
- increase DHCP lease time to eg 4h
- ensure group-key-update is eg 1h
- disable keepalive-frames
It’s just a pity we can’t adjust beacon frequency and DTIM:
http://forum.mikrotik.com/t/wireless-beacon-interval-and-dtim-missing/104699/1