Not as dangerous as John Wick
Mid-game DLC is an interesting experiment, and to its credit, Baba Yaga integrates well into Rise of the Tomb Raider's first non-linear hub area. ... as well as anything else works in that hub, anyway.
But this content suffers from the same key shortcoming as the main game: it just isn't very interesting. There's one sequence that's pretty cool-looking, with hallucinatory flashbacks and trippy visuals -- you know, just like the Scarecrow sequences in the Batman games. (And the poison dart scene in Uncharted 3.) It feels overwhelmingly like a rip-off.
Other than that, there isn't much to this DLC. A fidgety puzzle, a frustrating boss fight, and a "twist" that's telegraphed a mile away by collectible audio diaries. Yep -- Baba Yaga is more of the same, for Rise of the Tomb Raider.
Better than: Red Faction: Guerrilla - Demons of the Badlands
Not as good as: BioShock 2: Minerva's Den
At least it's better than: that Harley Quinn mini-fight DLC, in Arkham Knight.