Here's my prediction: after the initial hype for a new Game Maker with "drawing while you animate", sales will drop massively and GMS 2 will be another flop for YYG. Why? Because while it may be streamlining workflows, GMS 2 is making it even harder for developers to do what they want to do.
Yoyogames is a completely incompetent company. Game Maker has been around for over a decade and a half, and yet it still doesn't provide adequate support for 3D and Multiplayer games. I already wrote at length on their failures with 3D, and loss of market share to Unity as a result, on the old GMC forums:
Notice also how the delusional Game Maker fans attacked me for stating the plain truth. These are the people that YYG exploits.
Choice quote: Game Maker is not a viable platform for making 3D games, it's one of the biggest limitations of the software and I actually agree with the OP on this. There is a very good reason why Unity is almost universally preferred to Game Maker. And this was back in 2013!
Now YYG is removing ALL 3D support from the engine (check out the "D3D" section here: http://help.yoyogames.com/hc/en-us/articles/231738328). Entire 3D projects created in Game Maker are now going to be completely obsolete.
So, what is GMS good for now? Pretty much only 2D games, and even many free engines such as Godot (https://godotengine.org/) are now considered to be better at 2D than Game Maker.
Basically, the only reason to use Game Maker nowadays is if you already built up considerable knowledge about it. There is no reason for a new user to pick up this software and pay for it. And that's pretty disastrous for YYG.
When you consider all the removed functionality from Game Maker Studio 2 (even minor things like the idiotic decision to remove instance_create()), along with the price hike and forcing GMS 1 users to pay for the new version, we can speculate with full confidence that this new version of Studio is going to be another blundering failure and Yoyogames will continue to be the laughingstock of the game development community.