There's mixed feelings.
As Cavalry, I enjoyed the MM Ones, as there was no often Houses to garrison, No Roofs to sit upon, and quite often large open areas, which are the best situation for a Cavalier.
When It comes to Siege, though, NW's Forts are very funny to play at. And As Pretty much all custom maps that were in MM for Siege are now in NW, I suppose NW Takes this one