Those NC never got in because of their size. Might be something for eu4 for example, but not eu.
No, they're fine for na1, actually. The only time they'll be a problem is for the 3 or so hours each week where NA has 90+ players on. Far more good than bad will be created. Furthermore, we have several smaller maps in rotation as is, so it does seem to be a bit of a contradiction.
San'di could use a bit of editing for battle, but Frosty River for example, is perfect as is.