Closed weapons should be the default.
I feel like most of this games problems would be fixed with having the closed weapons playlist as default.
First of all you can't do a custom search with closed weapons as an option, so the only way is to use the server browser or the playlist. Most of the servers are half empty because a lot of people just click play qnd don't bother to check other options.
The roof camping would be severly nerfed, since you cant have a support with a sniper, vehicules would be a lot more powerfull, since you wouldn't have 10 engineers in each team because people usually preffer assault rifles.
Battlefield has always been a game that was balanced by tweaking the classes or weapon categories., but now the balance has to be made for each ondividual weapon and gadget since you can mix and match however you like.
I am not saying remove the open weapon completly because a lot of people do prefer it, but just make closed weapons the default, so the majority of casual players that just hit play get into these servers, also giving an opportunity to new players to learn this system. I do think dividing the playerbase is a bad idea and they should stick to one system tho.