No Q-in-Q support though in SwOS.Both features are supported on CRS317-1G-16S+ :Damn.
Haven't tried SW/OS, but does this support VLANs?
We basically are after 10Gb switch, with good VLAN support, LACP, RSTP. Nothing layer 3.
https://wiki.mikrotik.com/wiki/SwOS/CRS317