Bingowings said:

It might also be nice to have some ANH style Alderaanian troops around.

At least there is a tech with a ANH-style helmet seen in the hanger later when Han and Lando talk.

By the way, that shot has some issues. The first one is color (at least, on the DVD). There are also scale/overlap issues with a few pilots in the background. However, there is very little source material available for them.. and that even includes fans with costumes. Perhaps a few seconds from the ending of the Rebel Assualt II video game could be used.. but I am doubtful.