However, I would not add any character names in the dialogue cards unless you plan to do it with every single card.
Well, in fact I was thinking more of lines like:
-"What's the situation, Captain?"
-"All communications are cut, Madam."
rather than:
Amidala -"What's the situation?"
Panaka-"All communication are cut".
So it's not really always adding the "names" of the characters before the lines (this I don't want, for various reasons), but giving hints about who is talking inside the sentences. There are already lots of lines like this in my edit, I just want to add a few more at some point. But just a few, really.
But maybe some subtle new editing will do enough.