Creating proper double doors will be a lot easier in the new version You will be able to flip / mirror the door while placing. So in order to create a double door, you would place a door, then just place another, mirrored door next to it. Good thing is both doors will open in the same direction in this case.
In addition to that, the game will automatically detect opposite doors, so opening one door opens the other one right next to it as well:
I feel like that one song should play that goes Parapapapa i'm lovin' it from Mcdonald's