They have been for years making it easier and easier for kids to score goals and now they took it away a bit so that may have pissed a lot of people off and not buying.
Then there are people like me and my group who enjoy the new gameplay a bit more than before but not crazy enough to pay $100 for this buggy mess of a yearly patch release so we will wait for it to be included in ea play or heavily discounted.
So all that to say, possibly the game is just less populated.
It doesnt help that they never figured out what caused the fatmanlag and that PS users have a huge advantage over xbox users and most people probably disable crossplay.