Good players can use practically any weapon in the game and succeed (ignoring level restricted playlists), although they might not be able to rack up a 30/40 kill game with only crap weapons. However, many times once a player determines which weapons he intends to use primarily (which could very well be a "meta" gun like a Mida), then a lot of times they just stick with that gun and don't bother wasting resources leveling up others. You can only troll with other weapons so much before it gets bored. I would rather increase my proficiency with preferred weapons over simply rotating weapon choices for the lolz of it. When it comes to secondaries, is a shotty/fusion/sidearm harder to use than a sniper? No, so why provide salt when someone uses one? Sure, you can camp in the back with one. But you can also camp in the back with your primary and just use shotty for when you get pushed (finally). No difference. Fusion rifles are probably the easiest weapon to use in the game, but people are still ignorant of them just like most people were ignorant about snipers until shotties got nerfed and they started actually using snipers. Newsflash, shotties are still just as good as they have ever been. Bottom line is that people blame weapons for their deaths waaaaaay too much in this game. 99% of the time they just got outplayed, and would still get outplayed just in a different fashion if the weapon choices were reversed.