I've been enjoying it so far. Visually it's stunning but in terms of gaming substance it's not more expansive than Rise of the Tomb Raider, which is not a bad thing. I think Square-Enix just hyped everyone up with the whole "world hubs" they kept talking about.
The tombs and crypts are more substantial than before, that's for sure.
Combat seems more toned down in terms of frequency. The game is clearly more about exploration and discovery than it is about running and gunning.