My wish list for 5222L revB (2.14) are:
a) can a 3rd or 4th event. It only have max of 2 events + continuous NAS recording
b) scheduled reboot every 6 or 12hrs. This camera always disconnects from router and needs power cycle
I'm not sure of your setup - is there a 2.4GHz traffic jam in your area?
Would a 5Ghz signal work?
There are devices/repeaters you can use to switch to 5GHz, just wire your camera into that, and connect 5GHz to your router.
I don't like all your apple devices though. My one apple ipod has caused me so many disconnects. 
I moved the 5222L to another home with less crowded wifi and is now stable, plus the router is good too (dir-885L).
I hate wires

, so would not physically connect IP cam to lan port, I do have a wireless repeater though.
The scheduled reboot once a day still helps.
btw, there are several non-apple device

.. 2 andriod phones, asus laptop
Wishlist from me:a) add 3rd or 4th event. It only have max of 2 events + continuous NAS recording
b) improve internal watchdog logic, if 5222L is not connected to wifi or failed FTP, then try internal restart or full restart maybe.
c) Snapshot FTP transfer - add "Day Folder" instead just FTPing pics to one folder which is really having too many files already.
d) Add cyclic SD CARD recording - e.g. delete oldest image/video on SD card when full. FTP also stops when SD card is full.
e) SNAPSHOT URL - add option to disable authentication (same as 942L, 930L, 5020L, 960L )
Thanks.