A Gamepass employee just confirmed there is no 2nd Gamepass update for December, the first month without 2 updates as far as I know. I really hope this is not the start of a new precedent of only 1 update per month going forward. This is not the right time for Xbox to get lax with Gamepass, not when Sony is gunning for them hard with PS+ mid and high tier.
For December Gamepass added 10 Games, one of which was PC only, another of which was an Xbox One version of a game already on Gamepass on Xbox Series. The breakdown of those remaining 8 games was 1 AAA, 2 AA's, and 5 indies.
By comparison, for December, PS+ mid tier added 18 games while PS+ high tier added 4 games. The breakdown for those 22 games is 9 AAA's, 8 AA's, and 5 indies.
Xbox really needs to step things up with Gamepass in 2023, they definitely shouldn't be getting lax like this. This kind of overconfidence can be dangerous (it reminds me of Sony moving from PS2 to PS3), not to mention as a Gamepass subscriber I personally don't feel satisfied with these December additions at all.