The interior of the Sentinel’s cockpit is similar to the Lambda’s anyway (unlike the Zeta), so he wouldn’t have to change anything there.
So does the exterior nose, which means some background replacement for the docking bay set instead of replacing every set piece.
I am, however, very much in favor of seeing a string of thousands of various cargo/construction crafts moving between the Death Star and the moon, which can include the Zeta-class; for there it makes sense and I hope we see it.
I was thinking of this too, but does the current dialog on the Star Destroyer allow for Tydirium to just be one of hundreds they’ve seen today? And would they all have to pass right over the Destroyer and “fly casual”?