I really liked the original UoE because of the "epic" wide screen aerial photography of the films, and the fact that Disney pulled the multi-plane animation camera out of storage for the first time in decades to do the animated dinosaur sequences
The Ellen version to me is like watching a sitcom in a movie theater, it's funny but I think it's a little underwhelming in terms of production value
Both versions cover pretty much the same information, but if they replace Ellen with anything, my vote would be for something along the lines of the cutting-edge "epic" approach of the original show
...and if they brought back the "Age of Aquarius", choir-singing, original theme song I wouldn't mind at all, even though it was probably 10 years out of style the day it opened in '82, I still love that crazy theme song