bits3rpent

No

This driver does not support monitor mode. It is hardmac-based and therefore most likely will never support monitor mode.

How did you find that it supports 802.11a, does your router support only using a?

I seem to be having trouble connecting to my 5Ghz network as mentioned above. /var/log/wpa_supplicant.log shows that I somehow do connect to it. What do your logs show? wlp0s20u1: Trying...

My Alfa card still cannot connect to my 5Ghz network, but my latest pull request seems to have gotten 5Ghz to work on AC56 with no issues.

Have you connected to your router on other devices?