I posted this in the thread that got poofed, but no ride since Splash Mountain has been aimed at the whole family at MK.
2007: MILF (Not a ride. Not really aimed at more than the kids in the family)
2004: Alien Encounter becomes Stitch (the most adult ride in the park becomes a kid's crapfest)
2003: Philharmagic. (The whole family might like it, but it's still just another 3D show and a good trailer for Disney films)
2001: Magic Carpets (Ugh. Kids.)
1999: Pooh (Small families and kids)
1998: New Tiki Room (Not even kids liked this)
Buzz (I guess this is a family ride, but a cheaply done one at that)
1996: Mickey's Toontown fair
1995: Timekeeper (I liked this a lot. But it's still just a circlevision show. Alien Encounter also got built).
1992: SPLASH
So since that magical year in 1992, we've gotten two attractions that teens and/or adults could enjoy as much as the kids. They then took one away. I don't think wanting more is too much to ask.