The only element from rogue one I would like in a new hope is the Scarif planet as well as a better sense of scale with the death star.
I agree those would be great to see. If possible, though, I also think it’d be nice if we can catch a glimpse of a K-2 droid walking in the hallways of the Death Star. Could be far in the background in the hallways (to help fill in the void in some areas) while Ben is sneaking around, and/or one could walk past our heroes while they are in disguise and waiting for the elevator. I’m positive Ady already considered all of this 😉