Mmm, how is throughput? I know that on an OrangePi PC (same Allwinner H3) I was getting 5MB/s for a point to point transfer, didn't check relay throughput though. I assume the H5 would do better with gigabit and 2.5x better NEON performance, but I've yet to test (just got kernel 4.10 built for it & booting Debian reliably).