The reason we're getting a lot of content with Andrew at the moment, is because the Devs are setting up the 2 routes that will specifically have Anna staying with Andrew. And that's mainly because Deep decided to have Andrew get shot, and that effectively ruled him out of any content for weeks. So now were playing catch-up, because if he hadn't been shot, they could have spread his content over a much longer period.
The original plan for Andrew, didn't involve him getting shot. Deep was persuaded to do that, against his better judgement by the Patrons who hate Andrew (and there a lot of them). And I think he may then have intended for Andrew to maybe die during the second operation or in it's aftermath? But having done that, he was then persuaded by Awake, who became co-Dev and the main writer of the game at the start of Chapter 2, to re-habilitate Andrew and have routes where Anna and Andrew stay together. But that meant of course, they couldn't start those routes until a 'reasonable' amount of time passed, for Andrew to recover from his injuries. And that's why virtually every update we're getting Andrew scenes, and corresponding scenes involving John, who is likely to play a big role in one of those routes.
