After playing (and dying) a bunch, I decided there were too little cover opportunities, so I created a Hesco-style barrier that I then placed a whole bunch of all over the map.
Also added a sunlight system back, so the game isn't entirely overcast lighting, now the map is bathed in golden sunlight :)
And finally, I added the sniper scope back to the rifle, had gone missing since working on the new version of the rifle.