Hazelight Studios' Programmer Lucas de Vries took to Reddit to answer some questions about A Way Out, a game launching on PS4/XB1 later this week. During the AMA, one fan asked why the game wasn't coming to Switch, to which de Vries said the following.
As for Switch, we're definitely fans of the console over here, but there were some factors preventing us from doing a Switch release. It came out quite late in our development cycle, and we've been very busy spending all our time getting the game to the highest quality we could make it.
Also, since both players require their own camera control, it would mean that you would be forced to buy an extra pro controller to even play the game, which seems like it would be a little unfair to the concept of the Switch. It would have been quite an effort to make an automatic camera system to make single-joycon play work.
The late development cycle answer makes complete sense to me. The game certainly had a lot of years put into it before the Switch was even a thing. The controller answer is 100% lame in my opinion. If you're playing the game on any platform, be it Xbox One or PS4, you'll have to have two controllers. de Vries says you'd be forced to buy a second Pro Controller to play the game, but why not buy a second set of Joy-Con? Just because some Switch games let you use a single Joy-Con for co-op doesn't mean all games have to do that. All games don't as a matter of fact! Not to mention this is only an issue if you're playing local co-op, instead of online.