Good to know on the buildings. Water planes is something I want to look into re-doing as well. If you have GE you can delete the waterplanes for your personal save. Should not cause any problems for you.
Yeah, I figured it could be removed. Other small issues so far are that some of the land around your placed areas are not purchasable. We cannot decorate around the vehicle shop and things like that. My guess is we will not be able to remove snow in those spots as well. Also, the shadows for the map are very pixelated. Makes cloud shadows really bad and flicker across ground.