http://www.starwars.com/news/a-statement-regarding-new-rumors
"We don’t normally respond to fan or press speculation, but there is a rumor circulating that we would like to address. We want to assure our fans that Lucasfilm has no plans to digitally recreate Carrie Fisher’s performance as Princess or General Leia Organa.
Carrie Fisher was, is, and always will be a part of the Lucasfilm family. She was our princess, our general, and more importantly, our friend. We are still hurting from her loss. We cherish her memory and legacy as Princess Leia, and will always strive to honor everything she gave to Star Wars."
The fact that Disney had to issue such a press release at all is testimony to the public unease on this issue in the wake of Rogue One. If LFL’s digital wizardry has no qualms about zombifying an actor who’s been dead for 20 years, why should they show any (the thinking goes) about resurrecting a mainstay of the SW franchise who died unexpectedly young?
It’s just as unethical as acting impersonating someone who’s been dead for 20 years. Should we regard all the Frankensteins that borrowed from Boris Karloff the acting mannerisms and similar-inspired prosthetics as unethical?
No.
It’s one thing for an actor to take inspiration from another actor’s portrayal of a role. It’s another thing for CGI effects houses to use computers to recreate in minute detail the visage of a human being who is no longer with us.
One is a performance, the other a mask. Without Guy Henry having Tarkin in RO wouldn’t have been possible.