I don’t think each individual building needs to be its own map. I feel like the game overall should have 8-9 maps, and within those maps are a bunch of familiar areas. Like the H5 map could include the Carruthers house, the H5 Myers house, the Children’s Clinic, Tower Farm, and maybe the jail. Perhaps they’re all connected via streets and neighborhoods and forests, etc.
Individual areas that I think would deserve an entire map would be like the HII hospital and the H6 Smith’s Grove. Those areas are big enough and spooky enough that I feel they should get a map all to themselves. If faithfully recreated they could be really amazing. Imagine perfectly recreating all the hoispital areas from HII, including the outside parking lot. That would be so much fun to explore and play in.
Or…imagine Alien Isolation, single player, but it’s Halloween. And instead of the Alien it’s Michael. And instead of the space station it’s Haddonfield with every location from the movies (1-6). That to me would be the ideal Halloween game. lol, then DLC with the H20 school.