Hi Falke17,
Yes i have eMMC (as a storage and booting from it), GbE and Wifi working, you can read about it here: https://forum.armbian.com/index.php/topic/3169-request-for-banana-pi-m64/?p=23560
GbE was optimized just to get best value out of it, those are the maximum values i could get, don't expect better than this unless you are experienced with tuning and can use some compiler optimization (aka gcc6).
eMMC is just as that.
HDMI to DVI is a problem found on many other boards and some kernel, so avoid using DVI if you can.
I will try to provide an OS image if it helps while Armbian not ready for the board.
I am now struggling to configure BT due to some patch needed, maybe someone with BT experience can help to accomplish this.