That's because SGE doesn't have any of that Tomorrowland spirit. The MK is NOT a kiddie park. I repeat, NOT a kiddie park. You talk about new attractions alienate certain segments, how about Pooh's Playful Spot? I'm alienated from that attraction because of my height and age. Nobody seems to have a problem with that. Many WDW fans liked AE and it wasn't completely about the attraction itself. It was all that the attraction represented: story is the most important thing and not everything near the castle has to have the little ones in mind.
And if you never saw AE without people laughing their heads off, you didn't see the show nearly as much as me. It was a dark comedy to begin with. Closer in tone to This Is Spinal Tap than Nightmare on Elm Street.
I also don't buy the "death" argument. There is death all the time in Disney animated features and it usually happens to good characters. Sure AE's was more graphic, but so what? That's the point. If you didn't "get" the attraction, you aren't going to enjoy it and there's nothing wrong with that. I don't really "get" Festival of the Lion King, but that doesn't make the many fans of the show wrong. In my opinion, AE fit Tomorrowland perfectly and was a real shot in the arm to the Magic Kingdom.