You improved on shading, an important part of mapping! However, people rather appreciate layouts than looks, and you should go for a design that is playable first.
TW is played in realistic mode, so keep that in mind when you create the layout. Most maps also go for a realistic battlefield feeling, hence you have trenches (that is why the game mode is called trenchwar), bunkers and sometimes even destroyed buildings.
This map would rather make a halfdecent DM map than a TW map. I suggest drawing the map you want to create on a sheet of paper first of all and then go on. There is no book, no building that has been written or built without at least a rough sketch.
But don't be disappointed, you get better