It seems WL is having the same problems now. I play both DKT and it was smooth for me, but I'm trying to play a few WL games now and it's just 1 red bar, it goes to 4 bars sometimes but then it goes down again, I played 1 game like that and it was horrible. Over 1 second delay, lucky the other person seemed to be having the same problem, we went to penalties and I won but it was a horrible game.
This year WL has been a lot better so I really hope this gets better later. I think the market is maybe overloading the servers with all the promos and SBCs they are releasing.