Well I really appreciate this very neat video you did! I also appreciate the hours you decided to spend in creating a very nice comparison. I personally never have been cluttered with the GMS1 interface as I never open so many windows at once. I also VERY much hate GMS2 becaus if the non intuitive GUI. But going beyond that, with your video I see that some things are MUCH better in GMS2 while as others are MUCH better in GMS1. In my case and for the use I make, GMS2 is not that great of an update as it does not fit with my style of programming and creating and if GM would have had the GMS2 interface back then, never would I have baught it.
I do see that, for example, tile's seem to be much easier to work with during room creation. BUT again, creating my own Tile-Based platform Engin for V1, GMS2's tile system cuts off some freedom I now have with my new engine.
As for sprite creation, GMS2's tools are much better and more advanced then GMS1 so that's a major point for small sprite touches and creation.
In my case, GMS2 is not worth the 80$ CAD upgrade yet and your video, just helped me see it more clearly. I had already tested GMS2 but got so frustrated in loosing my code by Xing out by mistake some windows. I searched so many times some options and tried soo many times understanding the tile engine that I simply uninstalled everything I had from GMS2 as I never got to even run half of what you did in the video as I got lost soooo many times.
I REALLY appreciate your video, I know it's not to complain about GMS2 or to talk about the rough GMS1 problems but it's there to serve as a comparison and seriously, very good job! Thanks for your time and effort!!! Seriously!!!