Sending MAnet is only available to MA Products. It is not an open Protocol. We are able to work as a receiving device but will probably never be able to work as a MAnet Sending device.
sACN we can look into. So far this was never requested. Which benefit do you see in sACN and which Devices are you trying to control?
I would also really like to see sACN output support, main reason being my pixel controller (pixlite 16) has more options when in sACN mode vs Artnet. The nicest being 4 universes of DMX output for my standard LED fixtures in addition to the SPI outputs to my pixels. Cheers