@Voodoo
It drives me crazy too. This, and the lack of interest among the classic users.
I'm not sure of what i did but, as i said, it will not help you anyway. The MOS version is not faster than the 68k one,(at least for me) so i'm beginning to believe that the problem lies elsewhere.
You can try to play with the serial speed of miami and the debug arguments of the MOS startup command. I remember playing with these.