This seems to imply no https://wiki.mikrotik.com/wiki/Manual:IP/Fasttrack
I do have the "Allow Fast Path" checkbox under IP < Settings which is why I'm a bit confused on it being supported or not.
Thanks for getting back to me!
/system logging action> set numbers=0 memory-lines=1 /system logging action> set numbers=0 memory-lines=500
Good news. Better than mine as now we know the limitation can be removed. I hope future means this year though
I asked MT about this MTU limitation. They assured me that the hardware supports jumbo frames and MTU should be increased in a future ROS version.