The main reasons this change was originally put in was:
1. To counterbalance the AI's greater strength, as people have noted.
2. To make the game feel faster (less waiting for ships to move around), without making the game harder or faster-paced in terms of how you have to react to the AI.
I don't think an option would be a good idea, because this is one of those things that affects balance rather severely. Whatever the relative speed of ships in the game is, has to be counterbalanced against the rest of the game balance. Actually, that right there is a really solid reason to not make any changes to this for a while, come to that. So feel free to discuss, but no changes coming on this anytime soon, now that I think of it that way -- good point Red Spot.
And welcome to the forums, url00!