UHF-R is older technology so I don’t think it will be implemented.
PSM1000 is useless because the beltpacks are receiving only and do not send data back. So there is no way to see RF or battery level.
No, with only a surface and a mixrack you always need a GigaAce connection. All the processing takes place in the mixrack, the surface is only a remote for the mixrack.