Ok, but what you deem is a minor detail is actually a fairly big one to me. Afterall, as a first part of a trilogy, the first impression is everything, and my first impression was that it wasn't possible that those two could ever hook up by the visual presentation of them being so different age-wise via their actors. The job of a movie is to sell the viewer on the premise, but right from the get-go, that broke down, IMHO.
But there are ways they could have fixed that, like lowering her age. Of course that would have made her title and her power questionable. For that, you could wait until the 2nd movie to have her parents killed off, with her then assuming power on her world. This has the consequence of fixing a few other things, such as the attraction Anakin has for her even stronger and relatable. But what was shown in TPM was not.