Hey,
Been reading the forums for quite some time now and love the communication you got here!
I am using a Route10 with an AP6 at home that is working perfect even though my home has concrete walls all over the place 
A thing I feel is missing is a simple glance on the firewall rules (webUI) to see a counter of any sort that shows traffic hits (and the ability to clear counters), so you easier can remove rules that are not needed.
Keep up your good work!