As far as I know, rooms cannot be moved, only destroyed and built again. But yet curious if I am wrong so commenting to follow.

i think you can cheat buildings in with console command(google), so it would be a workaround, i dont think there is mod for it
second: you can to that with "yellow alert gameplay 2.0" in its ini with the editor but its changing other things aswell(but you can edit that too)

Reinforcement drop rates can be found in... SteamLibrary\steamapps\workshop\content\268500\2663990965\Config, XComLW_Overhaul.ini, lines 2006~2009 are the array for DIFFICULTY-BASED modifier. You can find more information in that section of the .ini file, but what you'll probably wanna do is just copy the Rookie difficulty's modifier of -0.1, which will knock 5 alert levels off any reinforcement speed. It won't zero out reinforcements, but it'll make them significantly easier.