Ah so this is what I was waiting for. As others said it is far too open, at least that's what you said they said. More aesthetics would be nice as that is normally Dl or not for me. Gameplay look like it would be quite hectic and more cover is entirely nessacary otherwise this map has untapped potential that could be used in such a great way. Tl;dr: Add cover. Make more aesthetics. Less flat ground. More cool stuffs in general.
I think the eight rocks in the middle of map should be a bit bigger. (maybe replace them with Seastack rocks?) Aside from some slight spawn-killing at the bases, the gameplay was great.
In your layout, just putting rocks as cover in the middle makes it dull. You should put forerunner structures instead to keep your layout clean. Your map has plenty of space so it isnt too crouded for strafing, but think about a better cover system to improve your map's appearance.