Sure. The same here: far from me to criticize your choice and willing to do another IDE. I just wanted to share my point of view of what I would think would benefit most of the community.
I saw your video but I decided to not mention that feature of having "views" for each functions instead of seeing the whole file because I wanted to focus on the broader idea of collaboration instead of specific points that I like/dislike on your IDE.
But since you mention it, I would say that I don't think that feature (separate function view) is something that would attract me to use your IDE and I explain you why:
1) Having long files is far from my top issues of an IDE simply because I can simply jump to the function that I want usually if 1-3 clicks. (Android Studio, Xcode, VS all have functions list windows/dropdown that you can see all functions and double click to jump to it; Sublime has the GoTo Definitions that I can just press CMD+R and I see all definitions and even type with autocomplete - Although that is not working with Corona Editor as I mentioned on my previous post).
2) Due to Lua style (and JS would be the same), you can have variables that are being used by a function that were defined outside of that function, so you would not see that variables definitions in your one-function view). Yes, you can go to see the whole file or even search, but then you kind of lost the benefit of having one-function view since you now have to access 2 windows.
3) One of the nice things of Sublime and Atom is that it is very minimalist, allowing you have as space as possible to what matters: code area. Your IDE follows the same layout of LuaGlider and ZeroBraine with a lot of menus, buttons,... I think almost 30% of your IDE screen is lost with non-code area.
As a developer, my main concern is always to improve my coding efficiency, which translates to more bug-free good-quality code in less time as possible. For me, having that one-function view does not contribute significantly to that. What I believe would be a good area of IDE improvement would be to add resources to allow me to identify issues/bug, specially on a dynamic language like Lua. ZeroBrane tried to do that by adding luacheck and I installed on my Sublime a SublimeLinter-luacheck plugin as well.
That are my points. Again, not writing to criticize or discourage you. I just want to share my thoughts on it. Being a long-time member of the community I have seen several people that spend significant amount of time to develop tools that in the end less than 10 people are actually using it.