Another way to access Macintosh II or LC, could be through the Fusion or ShapeShifter emulators under the Amiga core. The problem is that neither work in MiST or MiSTer.
I understand that making a core of Macintosh LC, based on 020 would be enough to run many of the Mac games in color.
The point is that this has been raised long ago, and that is the key, time. Sooner or later a core will end up appearing or the Amiga core will be mature enough to be able to execute both Fusion and ShapeShifter and not kill themselves in the attempt.