Forgive us if any of these have been posted yet! We have perused a bit among the forums and got to talking and came up with the following ideas:
Weather - Implementing weather changes. Sometimes the map would be rainy or snowy, which would cause steeper areas to be slick and cause slides. Other times it could be nice, of course. Windy weather would affect bullet drop, and a foggy one would be nice, which would force closer combat and make snipers useless.
Daylight - Implement changes in time of day. Along with night-time sessions, they could implement NVG that could be worn over the helmet. Along with that, they could also implement tactical flashlights as a gun attachment, and if someone is wearing NVG and gets flashed with a light, it would temporarily blind them. As another side point, using a flashlight would make the user more visible at night (duh, right?).
Remove ammo boxes from filling an inventory slot, and instead implement a max number of bullets you can carry of each type.
Have guns and grenades (one one at a time, of course) that are "equipped" not take up an inventory slot.
Leaderboard "seasons" - we talked about this one just a little bit and hands down agreed it would be a good idea. Our thought process behind this is that if someone hits #1 or max level, or whatever the case, and gets bored/disappears for a bit, they will be more likely to return for the next "season" to do it all over again!
The last thing we kinda discussed was the idea of being able to keep any skins you find in the map, if you win the match. This would NOT include dropped skins from other players, but rather just the random ones here and there.
Contributions to these ideas are from both myself (KelaNox) and xZorbZx (my husband, who hates typing this much, and I'm faster at it....hehe)