We can at least easily check the account creation rate.
This is the first account (in my time zone) created or invited in November 2023:
https://www.warzone.com/Profile?p=71153567494&u=sadico_1This is the first account created or invited in October 2023:
https://www.warzone.com/Profile?p=49153163812&u=Springy_2So that's 4036 accounts created or invited in October 2023, an account growth rate of ~130/day.
This is what it's looked like historically:
and conveniently, I checked this for past Octobers too:
Might as well check games/day as well. There's been ~1.6MM games between mid-May and the end of October; that's about 9.5k games/day. That's about the same activity level as this time in 2021. So it doesn't look like this game's in significantly worse shape than it was two years ago.