I’ve seen the work done using the Starlight Mini upscaler on some DS9 laserdiscs that produces a final level of quality comparable to the TNG blue rays after manual processing with it. I’ve not seen it tested on anything as low quality as the OT deleted scenes but I am highly curious as to what it could do for especially the RotJ scenes as they’re of higher quality than the other two. It’s something that would need a skilled editor regardless as none of these models are plug and play yet.
I think the restoration models are much closer to useful than the purely generative ones that produce motion from stills however the predictive scene fillers are really useful, especially for background replacement or opening the matte for full screen picture.