So far so good with this firmware. I did a factory reset a while back when I was having all the mobile deviice disconnect issues which didn't solve it but after the upgrade to 1.11.0.20 the mobile device issue went away. Now in 1.12.0.18 everthing still seems to be stable. I have a tasker task on two android devices to monitor wifi connects and disconnects and neither of them are seeing any disconnect isssues.

I did notice that a few options now have been removed such as power configuration for wifi. I used to keep my power at about 50% so the neighborhood wouldn't be seing my routers but that setting is gone. I assume it had effects on backhaul performace and stability.

Also having a USB port that can do something is better than nothing. The usb port can now share printers. I do wish they would get around to making it mass storage capabile.