It's frustrating on many levels because:
-You get Ferrari peeked because of ping difference, giving peekers a huge advantage with almost no time to react.
-^tick rate on high population.
-There is an established meta for guns (HK HK45CT, AK-47/101, SCAR-L, MP9 as well as AS50) with almost no variety or gun balance to introduce new and interesting ways to play. When did you last see someone use a Remington 870 (and the Short variant), Makarov or FAMAS?
-Constant PD raids because someone just managed to hear a /y 10 TOES from some guy already being 10 meters below the earth due to the range of /yell and how it works.
-Top orgs are allied with each other.
-Massive sightline bases are really boring to play or raid against (Foundry for example)
-Forest shootouts are also pretty meh due to tree's obscuring less of your vision as the branches and leaf's are positioned higher.
-Adjusted weapon scopes/attachments made some combinations like M16A4+PMOII scope almost unusable as the sight is now covering your entire screen which will need developer attention to fix or revert, who knows when that will happen.
I honestly can't think of a single good thing but it keeps drawing us back so there's something to it?