I decided to implement your wireless system because my Netgear router wasn’t quite cutting it, unfortunately it has produced some less than desirable side-effects. I am using the same card species as you in the form of a d-link DWA-552.
If I change the parameters of the wifi card or even de-activate a wifi interface zeroshell dies with a kernel panic. I didn’t have time to write down the fault because it was the middle of the morning and I had to reboot the unit quickly to recover.
Slightly annoying, if you get a chance to update the drivers in a future version to see if they are more stable I would be grateful.