Firstly, thank you for undertaking the task of creating v2.0 from the ground up. I'm sure it's a big task. (I've made a little donation to cheer you along )
Notepad++ has been my text/code editor of choice for many years. When using the Arduino IDE, I found myself using keyboard shortcuts for functions that don't exist. (yet?!) To keep this post brief, I'll set them out below:
CTRL+D - duplicate selected characters. If no characters are selected, duplicate entire line.
CTRL+SHIFT+up/down - This moves a line (or selection of lines) up or down. SUPER handy.
Notepad++ also hase some other really cool features, like being able to make not only horizontal character selections, but also vertical. The way it's implemented is really smooth and intuitive, and makes certain edits extremely fast.
It would be great if these features could be implemented in the v2.0 release.
All the best,