I gave it a shot. It worked in AT mode, but I could not get them to communicate well in API mode. It seems the MAVLink datarate (as written) is too much for the Mesh network setup to handle. Let me know if you make any break-throughs. I have switched over to trying to use XBee Pro 802.15.4 modules to try and connect p2p for multiple UAVs.
I only use the Xbee Pros in the Peer to Peer mode and have not had any communication problems.