Yeah, I hate that directors can't leave well enough alone and have to digitally erase stuff from their older films. It becomes frustrating when a movie like Evil Dead gets a beautiful restoration for its blu-ray debut but is then altered from its original version because the director wanted to "fix" things.
By the way, did Cameron actually make alterations to T1? I remember reading about one or two shots that people had spotted, but I never saw screenshot comparisons. It's probably a given that he's made "fixes" to True Lies and The Abyss, which are hitting blu-ray later this year. I should probably brace myself for when the eventual remaster of T2 suffers a similar fate.