Most of these I can understand but the acceleration/deceleration is a very bad choice to make in a game as precise as Mega Man (especially Classic), there's a reason the sliding movement from MM1/2 was removed as early as MM3...
Precious Woman's stage in particular is very dreadful to play with how imprecise controls are on the fast moving 1 by 1 tiles in the mid section of the level.
I'll just have to see it out as the other stuff gets fixed up.