Upgraded my Orange Pi One to the beta and it mostly seems to work as before, with a couple of issues:
[ 5.717969] x_tables: section 3 reloc 5 sym 'mutex_lock': relocation 10 out of range (0xbf80008c -> 0xc080faf9)
[ 5.750496] systemd[1]: Failed to insert module 'ip_tables': Exec format error
Some module loading failure caused by the module being loaded too far from the kernel code, not sure why this has started happening for me after the upgrade.
Also, the lack of working device tree overlay parameters makes the pps-gpio overlay unusable on this board, since the overlay's default pin PD14 isn't an interrupt pin and so pps-gpio fails to find the interrupt it needs. The underlying code works fine, there's just no way to use it without compiling a custom device tree overlay that uses a different pin (I chose PG9). I also couldn't find a way to get armbian-add-overlay to work; there wasn't any obvious way to install kernel headers that included the device tree compiler it needs.
armbianmonitor log: http://ix.io/1gKB
