It’s a known fact that I am a huge fan of the Prequel Trilogy and everything that’s set during the Prequel Era in general, however one thing I never liked about the Prequel Era is the lack of realism in the numbers of the Grand Army of the Republic. In fact, officially it is estimated that during the Clone Wars the total number of Clones in service was 3 million, which is absolutely ridiculous when we consider that we’re talking about a war on a galactic scale. So, I would suggest changing Lama Su’s sentence in Attack of the Clones about the number of Clones in the Army.
The original sentence is this:

“200,000 units are ready, and a million more is well on the way.”

I’d suggest changing the sentence to become like this:

“200 billion units are ready, and a billion more is well on the way.”

This way, the number of Clones serving during the Clone Wars and then serving under the Empire would become (at least) 300 billion, wich is much more realistic on a scale of galactic proportions.