I only play the casual trios version but if they have changed matchmaking in this mode on the London server then it is a shambles.
My matches are utterly awful. My teammates are low level and play with the sole ambition of dying as quickly as possible, like lemmings. They always hot-drop, die like popped balloons and then leave. They also ping incessantly when downed yet rarely ping loot. There are also the ones who want to tear around the map as the party leader, quickly run into trouble, die and rage quit.
It used to be that I would get a day or two of fairly satisfying gaming with similarly skilled teammates amidst the dross of lemmings. But for the last couple of weeks it has been almost entirely lemmings. A disproportionate number of these players seem to be either Russian/Eastern European or Asian possibly Chinese. Which would also - to my mind at least - mean that matchmaking has failed.
I don't know what Respawn and EA are trying to achieve with all this but it makes them look bad in my eyes.