I have some ideas for the map. Hope you will like them.
1. At the end of the map make the C.A.R.T. shoot and blow a ammo storage or ammo factory.
2. At the minefield make it a DEATHfield, with mortars that shoot and blow the players there. (Because Muselk shown that a engie can pass the mines, and start trolling.)
3. In the city make some doorframes or what are them called look like a blown part of a wall, so the map will look more realistic. Here is a image:
(Hope you got the idea, also
SORRY FOR BAD ENGLISH)
4.
MAYBE, make the Blu spawn look like a armored version of the
Higgins Boat so players can't spawncamp.
(here is a image of a higgins boat with some information) #TF2_DDay
Hope something of my ideas will be added. But say to other people those ideas so the community is very much involved.