Seems a bit too advantageous to be able to place a 12" diameter bit of terrain you can shoot over, walk over, gain cover from & not be assaulted over, all for 35pts.
Oh which incidencally can shoot & contest objectives.
I have never seen the doors used as anything other than walk-overable by both sides.
May is not must.
If in doubt always choose the lesser of two weevils
just freaking do it ok?