Funnily enough I thought CGI Tarkin worked better than CGI Leia, and he had a lot more screen time. I would prefer a stylish exit, but CGI is fine by me too.
I had the very same impression. Tarkin was great. But the sequence with Leia receiving the Death Star plans didn't work for me. But they proved with the CGI-Tarkin that they could do it properly.
Maybe they put more effort on Tarkin, because he had the bigger role. And that bit with Leia did not receive as much attention because it was so short snippet.