@TheseusJason I can pretty much tell exactly what happened. Season 6 kicked off with the free to play week and sale which skyrocketed the game's exposure because suddenly people realized the game is actually fun and has been vastly improved since the disaster it launched as. People were talking about it and telling their friends, getting into the game together, etc. The theme of season 6 is also broadly appealing and interesting, the cosmetics are cool, the new map is cool, to the point that the whole game just became a Redacted simulator for myself and many others if I'm being honest. Redacted is the best thing that has come out for this game in years.
Then what happened? .... they removed Redacted for an entire week+. I'd assume they have some kind of metrics somewhere telling them what is and isn't popular in their game, but instead of listening to that and giving players more of what they wanted in this massive spike of activity, they continued to do the same stuff that people have been complaining about for years. Instead of DICE taking advantage of this MIRACULOUS opportunity that was handed to them, they fumbled it, as always. That was the disappointment.
So now we're halved on player count from 100k down to ~sub 40k peaks on some days, which is still dramatically higher than the previous peaks, but the downward trend continues without letting up.