The minotaurs are actually worse than regular minotaurs because they have this new leaping ability which knocks characters prone where they land (so they are in effect higher than normal CR). Not sure if leaping in would invalidate the ready action, with melee at least - they are not simply charging but almost 'flying' in (!) I suspect implementing ready would have all sorts of edge cases (which may be harder to program?), but it only gets worse the further you stray from the actual rules. Just implementing RAW (as far as possible - which is much further than now) would make the things easier to balance - I really hope this all changes.