I'd love to hear the reasoning from an executive around their thinking on parades ... my guess is they feel they need things like that at DLR for the locals to keep things fresh and something for them to see, etc. whereas at WDW the crowds are there and lots of first timers that are more concerned with rides than parades. Basically, why spend the money on parades and all the performers needed when they don't have to
But I do think more parades would be good - heck, bringing something (back) to Animal Kingdom would be something else drawing people there besides Pandora now/give something else for people to do there