I mean, fighters already get a speed boost when moving into position relative to their wing leader, and I don't remember anyone worrying too much about that
So just think of this as improving the consistency of fighter mechanics across the board.
Could we just order fighters to stay docked instead?
Hmm. It's more controls, it reduces the ability of pressure on the carrier to deal with its fighters, and it reduces the ability of the player to at-a-glance evaluate the state of a carrier's fighters, both friendly and enemy.
For this particular case, I think it also probably wouldn't work very well because it would still require fighters to catch up with a moving carrier, or for the carrier to stop/slow down - which is actually a tough problem to solve for the AI, because of so many conflicting considerations, and a pain for the player.