I wonder if the Devs are all US based and on leave for Thanksgiving. The issue looks very reminiscent of network lag back in the bad old days of 56k dial-up and has been introduced by last week's patch. The obvious thing for them to do would be to roll the patch back within 24 hours of seeing the effect it is having on game play for all players, and then work out what went pear-shaped.
If they are all US based, maybe don't release a patch before a public holiday.
In the meantime, I'm off to give CoD WWII multi a try while I wait for this to all blow over.