+1
Sorry if there is a conclusion to this somewhere else, I didn't see it.
I read this would be too difficult to develop but I don't understand why. I can imagine it could work like a temporary shift of this pivot just for immediate transformation like this:
1) You move the pivot of the "out of pegs" transformation (let's call this a Temporary Pivot) *
2) You do your rotation + other transformations comfortably around this pivot
3) Press Enter (or move to another drawing by clicking the "O")
4) The transformations you made using the Temporary Pivot get translated to the values related to the original pivot
5) The Temporary Pivot is forgotten
* Placing the Temporary Pivot:
I guess most comfortable would be to have a button to enable you to place the pivot by a single click anywhere in your view. But the idea of someone else here to have it appear always in the middle of your view by default is quite intuitive and maybe better, then you would be able to click and drag it elsewhere. Anyway chosing the way to move the pivot is probably not the hardest part of implementing this..
I'm always thinking being able to move this pivot would make my life much easier as I'm using "out of pegs" a lot and it's not very user friendly to always have to zoom out to find the rotation handler. So much so, that most often dragging the angle numerical value is more comfortable than that (and it is not very comfortable).
Please consider implementing this. ♥
PS: offtopic: an easier alternative improvement of the "out of pegs" transformation UI would be putting the rotation handle closer to the original pivot, this would save people like me some zooming out too