I love surprise, small entertainment acts in the parks. Things like Streetmosphere at the Studios, Dapper Dans, PUSH the trash can at MK (there's also one that blows bubbles in Future World I saw this week!), etc. Kind of spur of the moment things. Some of my best WDW memories are from those "little things" - that tend to be out of the way acts, and you get more personal interaction. That makes WDW different from other places.
I loved Tapestry of Dreams, too!! But I think having an afternoon parade at Epcot is difficult, and I would rather have no parade than one that was over-commercialized, all about the characters (i.e., MK parade or DHS parade). A parade that captured the spirit of Epcot (i.e., as Illuminations does) would be awesome, but tough to do!
Also... Illuminations... don't get rid of it or change it! It is just perfect.