Yes there definitely is something strange going on with the GL-MT300N-V2 connecting to Mikrotik AP’s.
Just tried a GL-AR300M-Lite, and it also works very well, connecting to the mikrotiks.
So maybe You are right, there is a problem with the drivers for the Mediatek chipset in the GL-MT300N-V2 - It could also be a Mikrotik problem (they also have their own problems
.
So to sum up
GL-AR750 → Mikrotik = OK
GL-B1300 → Mikrotik = OK
GL-AR300M-Lite → Mikrotik = OK
GL-MT300N-V2 → Mikrotik = NOT OK
So i Guess I’ll be taking the AR750 and GL-AR300M-Lite (as backup) with me on holliday this year :-).
Going to Greece and a lot of hotels down there are useing mikrotik equipment.