Possessed said:
There's still no evidence those (unfinished!) scenes were ever shown in theaters.
Is there any evidence to suggest the unfinished film as we know it was shown in cinemas?
They were still trying to do more shots after it had already been released to theaters.
The more important thing is that the "unfinished scenes" as you put it were complete in a sense. They were earmarked in position and were in color and good quality with a sound mix awaiting an unfinished special effect shot in most cases.
The most important things really is to do with the Bacta tank "Becoming red" with a possibly smokey dye injected in to it. Not sure if this is true though myself. But it is worth noting the observation. A Flash is mentioned in the script upon contact of the robot arm to the tank. The Line by 21B is interesting and how it all fits together with the extended scene of Leia and Luke smooching.
The other important observation is of General Veers never shot the power generators he was blown up before this happened. He got taken out and another AT-AT destroys the generator by his order.
other pilots shot the generator that is why the explosion does not have general veers in the shot of the explosion through the AT-AT window.