I posted why they were seasonal a little earlier.
Ironic that both the Timekeeper and COP hold views that Walt always stressed...which made his company what it was. Starting with a dream, and anything can happen. Or in Timekeeper, things are improbable - but never impossible. These are MAJOR points Walt Disney always wanted to demonstrate, and in such an entertaining way!
COP had its last major update in 1994, which brought the original song into WDW, updated the finale scene, added new dialog, sets, musical scores, and a new, fresh theming. It's the best, I think, yet. Here and there props are remodeled and new carpeting is put in, but nothing major since 1994.
While I would like to see it continually updated, say, 2004, I am not comfortable with this at all. Mainly because I am very nervous, based on refurbishment treatment I've seen to other attractions, such as Walt Disney's Enchanted Tiki Room. I am very fearful, therefore, and Disney really needs to bring in folks that worked on the 1994 version to keep it in line.