Right, i have had a look at the map and i too think it is quite small measuring wise - it seems if you make it around 1.5 times bigger or 1.25 it would be better. this would also cause taller structural areas and help in FPS.
Everything is too damn detailed! Mainly im talking about the Simpsons house - the amount of stuff you have added in the bedrooms is astonishing but a large factor in the huge filesize and fps.
I also found light white patches around places, i thought they were puddles but they are seen to frequently.
You have blocked off many areas - perhaps making things closer together - but making things bigger - and creating more routes to Moe’s Tavern ( and the warp to the PowerPlant) would be ideal gameplay wise. So removing some of the blocked off areas and adding more routes.
Another HUGE thing which you might need to think about if you want to keep your ass clean is -
Copyright - If i am not wrong you could be sued for millions because you are using Springfield in a Enemy Territory Map.
Also you have used the Simpsons photo’s e.t.c and the names of the Buildings - Moe’s Taven, Kwik - E - Mart.
Im not sure if this is an issue because you arent selling the map - but if this was ever put on to a cd and sold with a magazine it might lead to problems
DM aka Spike