So given BF4 finally appeared back in the top 10, and interestingly lead on last gen, I headed over to BF4stats and noticed they added a peak player count in last 24 hours feature.
This revealed a couple of interesting things.
1.) While the PS4 beating the Xbox One is not surprising, the PS3 notably topping the Xbox 360 suggests the series has a stronger userbase in Europe. Given EA's strength in Europe, this may not be shocking.
2.) The last gen versions are decidedly resilient in terms of active player count/engagement. If people were wondering why last-gen versions still exist, this is a good reason, as the people still playing the game are quite likely the ones also buying DLC.
3.) The timed DLC exclusives don't seem to be having much success in tilting the series toward Xbox. All three other platforms are notably stronger.