it needed more episodes so the Ashi-Jack relationship felt less like a plot device. also the erasing of Ashi felt really cheap to me, mainly because it's justified by bad time travel logic and also a bit because the only reason she doesn't vanish till the wedding is because that is when it will hurt the most. The ending also erases the entire supporting cast from existence which is kind of annoying that that is ignored by the ending. Something like
this would have been nice to make the ending actuality bitter sweet. don't get me wrong, overall the series was amazing (particularity the first 3 episodes) and basically everything up until Aku's death in the final was great. I criticizes out of love, because of how well everything I ain't complaining about was done in comparison.
end rant