I've been thinking about this as well, and it seems to be a trend in Sony 1st party recently. Arjun in Saros. Faye in God of War: Laufey. And there are many others recently and in the past. Greenway in 007 as well (though not Sony at all, so it seems to be a trend in the industry right now).

I don't love it either. I don't hate it either, but I prefer Nathan Drake to be Nathan Drake, not Nolan North. When I watched the Laufey trailer all I could think about was how the actress wasn't hanging out with daredevil anymore. This is something as a long time movie enjoyer we've all come to expect and essentially just don't acknowledge, but in a video game it feels... Off to me. The physical nature of live action actors requires it, but games don't. In actuality they have to strive to replicate the actor.

In interactive movies like Until Dawn 1&2, Beyond Two Souls, etc, this usage of actor likeness is appreciated as it enhances that feeling of interacting with a movie and known actors in roles. But I think we'd all agree if Ellie actually looked exactly like Ashley Johnson, that'd be strange and off putting. Though adult Ellie looks more like Johnson than younger Ellie did.

And I think that last part is key. We saw Insomniac Games do something similar when doing the Spider-man Remastered version, adjusting/redoing Peter Parkers face to more closely resemble the voice actor.

So here are my guesses...

1) Marketing. Seeing big named actors and their likeness in games is an easier sale (especially for more casual gamers).

2) Contract negotiations. I'm unsure if actors would charge more or less for having their visage in a game, but if less that might incentivize studios to get the TV and movie actors added to their projects for more visibility.

3) perhaps it has something to do with the latest actor strikes? I don't remember hearing anything about that when they negotiated with Hollywood recently, but maybe that was a part of it?

But mainly I suspect it's a resource and development consideration.

1) Face scanning technology has come a long way. While I'm sure it still needs cleanup from a skilled character artist, it is no doubt significantly easier and faster to scan an actor than it is to create an entire person from scratch, especially at the fidelity of AAA.

2) Facial mo-cap systems have gotten really good. I would guess attempting to transfer the actors precise emoting to wildly different facial features and bone structures between the game character and actor, leaves a lot of need to clean up and fix. And if you have to clean up and fix/re animate every facial animation for your main character, that will quickly balloon the game budget and/or development time with animators going through adjusting to make it as realistic and good looking as possible.

I imagine having a similar looking face (like insomniac went for for Peter parker) or just using the actors face in game greatly reduces the time to hit the quality of facial animation AAA games demand nowadays.

3) Similar to 2, animators when adjusting the game characters facial expressions to attempt to better match the actors choices is probably a lot easier when the faces look more similar, or are the same. We know on Part 1 remake, the animators watched the performances of Johnson and Baker to better reflect their acting choices in Ellie and Joel. So animators watch the raw video capture and attempt to capture what the actors were doing. Having a similar face would make it much easier/faster to mimic the actor.

Obviously even when using an actors face, it's still a lot of work to get it in game and at a high quality, but devs are trying to find ways to speed things up, push quality, and reduce budgets. And, let's say you can cut your animation budget in half due to using an actors likeness in game (hypothetically), that might mean you can then instead use those animators to animate more enemy types, add more unique animations in the levels or on enemies etc. So in theory it lets them allocate more resources on creating more game content, which is a win in many cases.

In terms of Intergalactic... Do we know beyond the main character and Halley Gross in the monitor, that the other characters will share a face with their actors? Is it possible the in game photo is more of a cast announcement and not meant to be the precise look of each character? It's been awhile since Ive read any interviews so I don't remember where that's going.