Is the Leia hologram new for 2.7?
Nope.
Do you know how far back this version of the scene was used?
The Leia shots were pretty much all done for 2.0 as far as I know. 1.0 simply used the blu-ray footage. I didn’t upgrade any of them for 2.7. And in the first hologram scene, I didn’t end up changing anything at all, even color-wise. The color would have been changed in Obiwan’s hut, which pretty much had shot by shot color adjustments (with varying levels of success).
The timestamps you’ve used are definitely the ideal way to represent which shots you’re asking about. However, it can also be helpful to include screenshots to quickly demonstrate which shots you’re discussing. If you’re asking about some specific tearing or compositing issues, a screenshot perhaps with the area highlighted could help explain what you’re talking about.
The point is most likely moot, as the next time this is upgraded (3.0), Harmy won’t be using GOUT sources. So these shots will either be taken from 35mm entirely, or re-rotoscoped, using 35mm instead of GOUT.