Yep. That's all that needs to be said here.Samuel T. Cogley said:
You can't suggest an ad-lib. Then it's not an ad-lib anymore.
Obviously, they are honoring the intent of the strike, so to try to find shady ways around it are not acceptable.
Just write it down on a post-it note and cross your fingers that the strike will end in time to shoot the line later.
Besides, one or two great lines will not make or break the movie anyway.

Orci and Kurtzman said on numerous occasions during the run-up to the strike that the script was well-prepared for the case of a strike--that the strike wouldn't impact shooting the film. I'm not worried that Abrams can't augment lines, and I'm glad that he isn't finding ways, or trying to find ways, to get around the restrictions the strike imposes on him. If every director and producer did try to find a way around the strike, then the effect of the strike would be delayed or mitigated--and that isn't something a man in Abrams' position wants to happen.