As far as I know, those "some are different" characters have not been unified, but got separate code points. And that's where your whole argumentation falls apart, unless you claim that the Unicode consortium mis-classified lots of characters.
But then I'd just retreat, because I don't speak any Asian language and cannot verify the claim myself. I can only defer to the experts, and they say that issue has been taken care of.
As far as space savings are concerned, I replied to that in another comment to you. It's not okay to dismiss Han unification as just some space saving sttempt that's not needed anymore. Space saving was one motivation, but according to the consortium not the primary one.
But then I'd just retreat, because I don't speak any Asian language and cannot verify the claim myself. I can only defer to the experts, and they say that issue has been taken care of.
As far as space savings are concerned, I replied to that in another comment to you. It's not okay to dismiss Han unification as just some space saving sttempt that's not needed anymore. Space saving was one motivation, but according to the consortium not the primary one.