I’m confused. The Atheros AR9460 wifi/BT card which ships in Librem laptops does not require non-free firmware for the wifi. It’s as free as you can get. Why would you want to replace it with another non-free card which provides no additional capability or performance?
The bluetooth component of the AR9640 does require non-free driver firmware currently, as we’re continuing to work on RE’ing that so that a completely free driver can be used.