WDW Couple is on RoTR right now, and it already looks a lot better than that tweet showed (parts of the pre-show were modified. Looks like Disney is adapting pretty quickly and has found a better way to slow down the flow of people into the parts of the ride where social distancing is harder (and they are doing a great job in the part right before you enter the main "ride vehicle", and the CMs are enforcing social distancing in character a little too). Also they said that Disney is shutting down access to queues if the lines hit a certain point (this is why MDE has been showing RoTR and MMRR as "closed" for various parts of the day). For both of them once they hit 60 minute waits, they start shutting things down.it appears they entered the Star Destroyer from the same door they entered
ETA the CMs ordered riders to sanitize their hands before entering the last pre-show room before the actual ride, that's pretty fun.
And it broke down... which is still really interesting honestly.
At least it broke down in the AT-AT room. There could be worse places to have extra time to look around.