>>3906463799% of the time I agree with you, but I would give a moral exception here. Due to the unique situation of so much backwards compatible content, and because the games are on a strict multimedia schedule. I would have no issue with the rest of the pokemon being patched in later.
That being said, what really gets me is that even though all of the pokemon should theoretically eventually get HD textures after a few releases, they still claim they won't have all pokemon in the games, even though all pokemon will have been updated by then