After a full weekend of thinking on R1 -- and a weekend of enjoying everyone's comments -- I have some more thoughts in no particular order.
CGI -- I was fine with it. Yes, as mentioned up-topic, those of us here on the RPF are highly (I almost said ridiculously) attuned to spotting things while those not so attuned are not. My wife had no idea Tarkin wasn't real. None. But then again, she not only isn't that knowledgeable about CGI, she has no idea who Peter Cushing -- as an actor -- was. She saw ANH multiple times, since I dragged her to it at least half a dozen times back in 1977 and enjoyed it each time, but she's still not a sci-fi/horror person and so Cushing is a stranger to her. For those reasons, the Tarkin that appeared in R1 seemed perfectly real and natural to her. As for Leia, her thought was just that Carrie Fisher looked so young, just like she remembers. (Which is unreal in itself, I suppose.)
I have to agree with what Kylash said above regarding lip movement. That's what always seems to be the telltale for me with CGI humans. It's also why the CGI K-2SO seemed perfectly real at all times to everyone or, for that matter, dinosaurs and other non-human animals on screen elsewhere. (That's why the apes in the new Planet of the Apes movies just don't work for me -- their lips don't move right.)
The real thing that bothered me about Tarkin, and I'm not sure anyone here has mentioned it yet, was his voice. It was good, but not great. It surprised me, in fact, that they couldn't have gotten a better voice actor for that.
Finally on Tarkin/Leia... I wonder how they'll look on my TV? It's really easy to see flaws when Cushing's head is 20 feet tall. It may all play much better on the home screen.
Fan service -- I liked most of it. R2 and 3PO were not only fine, but their moment added a lot for me. It wasn't overdone; just the right amount. (Yeah, we should have seen them on the Tantive, though, and not at the base.) All the cockpit shots of Red and Gold leader (and, I swear, Biggs) were wonderful inclusions. Dr Ugly and Walrus Guy were a stretch, logistically, but still didn't bother me. In short, most all were good and helped to connect R1 to the events of ANH that take place only a short time later. Thank goodness there was no Wookie, or at least I didn't spot one. I think that would really have crossed the line from fan service to fan pandering.
Wilhelm scream -- I never heard it. Maybe I missed it, but I'm hoping film producers are finally getting away from that. Popping that in is no longer "clever." It's not only annoying, but every time I hear it -- EVERY time -- it instantly takes me right out of the movie. Just like stupid 555 phone numbers.
Missing trailer bits -- There were several I would like to have seen, but none more than the shot of that TIE fighter rising at the end of the walkway as Jyn approaches. For me, that was the single most memorable shot in all the trailers (and they used it repeatedly). It's one hell of a fantastic shot, and I couldn't possibly be more disappointed that it wasn't in the final film.
A.J.
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Oh, one last thought on the discussion of Chirrhut being able to walk through a barrage of Stormtrooper fire without getting hit. He absolutely HAD to be in touch with the Force for that to happen. If not, then our only recourse is to assume that Stormtroopers can't manage to hit the side of a barn.
And that certainly can't be true, can it?
A.J.