I don't really have time or will to scroll through all those other suggestions.I do spend time,so,does that help me any?Not really;but thinking about what's missing.
Salvatore Leone skin PROBABLY DOES EXIST,Rosenberg's surely does.If someone appears in the scenes,they probably exist in the game too,like Claude.
Moving skins to other classes SURELY IS NOT IMPOSSIBLE.
YOU HAVEN'T GIVEN REASONS WHY things like clan chat shouldn't exist.
Laying on ground probably can be done,after some complex work.Maybe that's a mod,and another application,but it worked on MTA server I'm playing on,which has PUBG mod.
Mini map probably is not impossible either.Just open a mini model of existing map.
Bunny hop may have been a stupid idea,but hey,at least I thought of something.We need more fun stuff like that.