As part of the legendary weapons arsenal, add more ww2 weapons, from all the powers, as I'm only seeing German and Russian weapons. Add the U.S., Japanese, Italian, British, etc. If you think the stats are going to overlaps, make it as an part of something like "ww2 rifle chest" containing the k98, the Arisaka, and the enfield or something like you do in warchests containing both the gold and the premium. This would raise more chance for those that are having extremely hard time obtaining the legendary weapons as well as add more variety to what you can get, creating a "collectible" system. Like to spread the ideas to the devs.
The levels of players varies too much. In one round, I saw a level 15 person getting destroyed by a level 23 person by a single bullet from a machine gun. After some time, it wouldn't be fun if there are overpowering people surrounding you everywhere and getting killed from every single direction within a second. I think they should work on filtering of the levels.
There should be really 2-3 levels differences per player in the same match.