Pretty much, they've had one great game, one game they fucked up and few relatively unknown games. And, as the article says, Geralt's story is over, so they have to start from scratch there as well. I wish them luck because I still quite like them, but it's definitely gonna be a tough road.
They also did the closest thing to a Steam competitor and brought a lot of popular-but-unavailable games back to the light of day via doing legwork to track rights down and pick up the right to re-release them.
That may not be game development, other than in putting together compatibility software and some client software, but it was successful. Probably had a bigger impact than The Witcher 3.