The Choatic Alliance Raid, has only two mechanics which keep it from being midcore

[ArchlordPie]

https://steamcharts.com/app/39210#1m

The holidays don't have much to do with the fact that no one is playing the game at the minute. There were only 5% fewer players on the 23-25th than the surrounding days. It's just a continuation of the same downwards trend that we've seen since Dawntrail released.

Alternate theory: the only people still playing this game are people who really have nothing better to do. Including spending the holidays doing IRL things.