"I always found it hard to imagine him fighting in the Time War. I’d always imagined the ‘Time War Doctor’ would be more grizzled, somehow, you know?" - Moffat (x)
Did it ever occur to you that it would be fascinating to see how someone as “dashing, terribly handsome and quite romantic” (as you say Eight is) could become someone grizzled and presumably rougher, and more tough and gritty? No? Because that would involve actual character development, oh, of course, yes clearly it’s a much better idea to just potion-zap yourself into a more gritty, ‘warrior’ of a Doctor, rather than explore the nuances of a complicated personality and what war and strife and death can do to a person. OBVIOUSLY.
Yeah, this is why I was kind of disappointed with the idea of the War Doctor. As nice as it was to see Paul McGann in the extra scene and as much as I love John Hurt, I would have rather seen what it was like for that dashing, romantic Eight would be dragged into the war. Let that bitterness Nine displayed be not just for what he had to do, but for the man that the Time War had changed him in to.
Rather than giving us the warrior the Doctor made a choice to become, give us the warrior that the Doctor was forced into being by what he faced.