I am interested in this.
In 8, I remember it being a revelation to find out (from adamw on the forum) that we could move a group of objects together using the Shift key, as you say.
All the same, for me this was useful only sometimes, seldom, mainly for a quick and dirty data repair, which often seemed to solve a problem rather than really solving it. More usually, there was a major but subtle data workflow issue elsewhere, and the real solution was to solve that (or to recreate the data).
What I'm saying is that I'm not sure I really miss it, as an interactive editing tool.
Can you explain more about what you wound up doing here to solve your problem?
What method did you use for the "nudge" (a move transform?), and also what does reprojection have to do with the editing?
Do we need more? Even some more "nice to have" tools?