I'm not testing the VPN yet. Now only just trying to get stable wifi uplink and downlink, and even that fails with all the releases I have tested, Be it failing for different reasons on different versions.
4.3.19 : unstable uplink, firewall reload on disconnect, no DFS connect, failed receiving AMPDU with many MPDU(index>31), enforced roaming with disconnect
4.3.21: unstable uplink, firewall reload on disconnect, but connects to DFS, failed receiving AMPDU with >31 MPDU, enforced roaming with disconnect
4.7.2beta: stable uplink if no BSSID with DFS around, no DFS connect, AMPDU ok, more settings in the GUI, but very very weak wifi TXpower
It's beta, so lets hope the fix comes soon.