I feel like Map 4 is too small. Of course you might say its already large enough but not really nowadays. What's exclusive about it is the size but I think it still could be better.
More corridors could really help. And also make it quite easy to navigate so it does help players out if they lost track.
Rooms is probably an important aspect of the map. I know you're gonna say there's already enough rooms, again it kind of fun to discover new and hidden areas. Also in addition, easter eggs (hidden secrets) could be in place to at least make the map enhanced.
Outside the blue house at the backyard, consider adding some huts for a mini hiding spot or a place to find useful items. Just only at the back of the house and maybe add at least 1 window to look out for anything.
What are your thoughts on this idea?