I'm looking at the GWN7664LR and have pulled the fcc images showing IPQ8072A. I'm seeing that there's some progress on this but it's on some Xoami products and I didn't want to muddy those posts up. @robimarko looks like you've done the most work on the IPQ8072A, have you looked at this grandstream?
Unfortunately I just don't have the time to hack on this, hoping I can borrow some of that effort from others. I'm willing to buy and ship one of these untis to get it in a skilled person's hands.
A little off topic here, but I'm mostly just looking for an outdoor grade 4x4 ax product on openwrt because I need to run batman-adv on it. This unit fits the bill other than lack of available openwrt image.