One thing I do wish is that there was more continuity across the sites. I have played at countless sites and do not consider myself to have a 'home' site (although I am a little bored of trying news one all the time now) and I have seen some sites that do it really well and others which are a shit show.
Some have full auto MED which makes sense, others are a horrible hosefest, some have rules with no full auto into or out of a building, others dont care if you get half a hi cap to the face from 2m away in a room, varying grenade rules, varying bang rules, one had a VERY stupid rule where a grenade in the building kills everyone in the building. I was totally confused to be told I was dead because a grenade went off two rooms away whilst I was hiding in the dark under a brick countertop so if thats not hard cover I dont know what is.
Levels of marshalling could do with a standardised approach too, some of our team complained about a certain player at a site last month, I had heard others talk about the invincible grey hoody wearer too and had shot him myself a few times. A little squad I was near moaned about him not taking hits to a marshal who said thanks for letting me know, said marshal then went about 30m in the opposite direction of the enemy player (actually behind us) and started to shoot us all. We were really confused and were asking WTF then he said we were too clos to the enemy so hes shooting us to force a respawn. Pretty mad tbh.
Needless to say grey hoodie still had god mode activated for the rest of the day.