Getting hitscaned by snipers you can't even see due to draw distance, often in a corridor with no cover or alternative path, isn't very fun.
Only a problem on the last map with that phony fog that only restrict the player's vision.
No. It's a problem in Kosovo to a smaller degree and very obvious in Siberia map. In fact the first enemy you'll encounter in that map is a sniper on a tower which you can't see, but if they do aggro against you, they'll be shooting you with pinpoint accuracy from beyond your POV. The game is shite and I think you all might be remembering things bit too fondly from when you last played it because it's definitely one of the weakest shooters I've ever played, old or new.
P.S.
I stopped playing by the Middle Eastern map because the game became too much of a slog. I finished the game fully AGES ago though.
EDIT:
Only a problem, as if the game didn't have rest of the problems I just explained and wouldn't be as equally bad even without the sniper bullshit.