Right then. Inspiration from Foxy Stevenson, Raymond Calitri and other creators who use the platforms to create DM arenas, here is my first attempt...
OUTFLOW / XBOX1 / 12 players / 2 teams / RSC LINK
Hey, that looks well made, I like symetrical maps a lot, nice use of that section for the base of your map. +1 for the verticality, it gives more life, compared to the boring flat run and gun maps. The underwater part reminds me of a part on my map Unreal Blue, which also has a secret underwater tunnel to the other side of the map
Since you also have longer range on your map you might want to add the assault rifle as a pickup in the middle since it's not that much more powerful than the combat pdw but has the range you need. Just a thought. It's kind of difficult to judge a map just from a video, but try it out with some players and see how it plays and if it really needs changes.
Overall, it's a good start, might be a little too open, but since you only have 12 players it might be good anyway. Normally creators just shove 30 players into a map like that and call it a day. lol
Keep on creating.