Woman Time Lords can control the way they will look when they regenerate, while male Time Lords cannot. This was established in Classic Who, when Romana regenerated.
Also, the Doctor wanting to be Ginger is not about the hair color. In Gallifrey, the only ones to have red hair were the people called Heroes which were beings who were time-sentient (meaning they could see all of the time at the same time). So I doubt they will ever make him ginger.
Sherlock Pilot vs Study in Pink
diD THEY JUST SHOOT THE PILOT THEN EVERYONE WATCHED IT AND THEYRE LIKE ‘ITS….. SO GAY’
AND THEN THEY SHOT IT AGAIN JUST WITH THE INSTRUCTION ‘LESS GAY’
All the gay