Okay so heres a list of things you should add or change on your map, (Btw Don't think I hate the map I love it.)

You should add more islands and more the monuments more apart.
You could try to make it look like a real rust map[kortal.org]
Fix the dome
Try to add some more monuments (Like the tunnels)
Why so much water?, You could add some small islands, Great for building on.
Fix the spawning out of the map glitch.
Remove some of the nodes and trees (Their is way to many)
Add a way to the oil rig.
Add a way for players to explore deadzones

That's all I have for now, Leave what you want in the comments.
(And I get that this is the 1st map like this you have made.)