I've followed the same procedure I have successfully used with Jessie, but the GUI isn't working properly.
Installation process:
* Installed from USB stick, graphical install chosen.
* LVM with full disk encryption.
* All data in one partition.
Software selection:
* Added MATE Desktop Environment (also tried xfce).
* Removed print server.
* Added SSH server.
Installation proceeds as normal. Reboot at end.
Successfully decrypt system volume.
LightDM wallpaper appears, but no UI elements.
Manually installing Slim or SDDM causes a viable login dialog to appear after a reboot, but the desktop never seems to load - no menu is displayed.
Anybody having a similar experience and got it working?