It doesn't. It's the people who actually did all the work who are benefiting, not the corporate entity. The coordinated mass resignations make it obvious that the former management is ready to immediately start up their own company in the office next door and hire on everyone who just quit Annapurna.
Not the parent company, but the game team that resigned is in a better position. They can continue focus on building games, instead of being 'integrated' with the TV, film and theater people (I bet most of that 'integration' is about 'outsourcing' CGI work to the 3D artists in the game team - e.g. a distraction from making games).
You're not quite there. Annapurna does not make games, it publishes them. There's no significant number of 3D artist working there. Even on the movie side, they don't directly make the movies.