I started playing the game about 15 ago, I didn't experience a new expansion in this game as of yet.
I'm wondering, the recent influx of players, is that something that always happens before an expansion, and will they disappear again a few weeks into it? So that things return to normal?
Or will we get more servers so that things are less congested?

How was the problem addressed in prior expansions, or did the problem not exist then?