I really found this editor to save a lot of pain from GMS2 editor, especially because their recent shortcuts update has broken it for me (e.g. I have to press Ctrl-T or Ctrl-S 5 times for it to pick it up. Reported it to yoyo but it might take some time to fix. Without this bug I wouldn't have discovered this tool :)).
It's a pity I didn't use it before, as I really love the strictness the editor tries to apply. But besides that it feels much more productive and one cannot point it to just one thing. Anyways... here's some notes I jotted down. It's the least I could do to provide some feedback. I'm not expecting any of this to be fixed or taken any action upon.
Thanks again for this editor!
1. Duplicating of sprites is disabled
2. Cannot import sprites by drag and dropping
3. A cool feature would be to have a symbolic link to a sprite source, so if that source changes, it auto-updates. This is one of the features of GameMaker I really don't like. Coming from Unity where you have images that keep their name, this was quite a shock.
4. Building in GMEdit keeps creating drives (but this is a plugin issue really... I'll report that to plugin author)
5. Even if auto-stop is enabled, running fails (same as above)
6. Adding sprites through the GMEdit UI, will not be part of auto-complete unless you restart app
7. ///@desc Some description isn't picked up
8. Pressing Ctrl-T and then clicking outside of the window should hide it
9. Parameters help (found at the bottom) don't continue when one of the params is an anonymous function across multiple lines
10. Editor doesn't remember window position/size
11. Outline view should have a clearer separator between files. This could be a horizontal line or title of file has a different background color. Current file is underlined, perhaps even that should have a different background color. (Using dark theme)
12. If I hover mouse on scroll bar margin of the Show Aside window, the scrollbar goes to the top
13. Show aside window to Builder Output window doesn't auto scroll as output gets added (probably should report this too to the builder plugin author)
14. Sometimes Object Information doesn't do anything
15. Find in Tree red square outline highlight is not so visible. Should ideally change the background color as the outline is barely visible
16. Selecting an item in tree view and pressing F2 should get into renaming asset mode
17. Selecting an item in tree view and pressing Shift-F1 should find references
18. Option for Search in Files to use the same tab for results
19. You cannot jump to roomCreateCode search result (it was actually automatically launching the beta GMS editor for some reason)
20. Instance variables which are declared in a method called inside create event, are not considered to be instance variables
21. It seems that the more a line has more warnings, the more the CSS styling is applied on top of each other.
22. When having a multi-row tabs at the top, the end of the file is not visible (when the window needs to scroll)