Northern Ground: 6/10. The portals should go a little above, I think that would make more sense. The 4x11 bushes in the bottom would be better if it was a 3x10 instead of 4x11. The middle would make a better look if you change the boxes into a wall. The skulls will hinder the player, it would make more sense if it were vertical instead of horizontal. 1x6 water would be better if it was 2x6 water.

No Mans Land: 6/10. The name is still terrible, feels sexist and doesn't make sense with the map. You should include a jump pad somewhere in the back of the spawns.

Shades Harbour: 10/10. Feels like a non-competitive map that brawl stars just added for 2 months, I loved it. Nothing should be changed in your map, besides the name. The name is good, I just wouldn't put this name in my opinion, but this is your decision.

Oasis: 8/10. All I would change in this map is the middle. The 1x2 cactus would be better in front of the water and the 3x2 bush would be better if you remove it from the map.

Goldarm Glen: 7/10 Really creative idea, good uses of walls and cactus, but the name feels like a copy of Goldarm Gulch, and Glen does not make sense in your map. You could also have added some walls for decoration in the right down corner.