Don't forget that these tasks are designed to be basically impossible. For the majority of the public, watching two teams come up with some sensible ideas (on whatever subject matter) and then executing them successfully will be downright boring. Where The Apprentice excels is in creating challenges which will ultimately lead to the contestants fighting between each other, which makes good TV. For example, take any task where the team has to design a product and develop the marketing - the two 'subteams' will work in almost total isolation at the same time, which would literally never happen in a real business. Of course the marketing materials and the product aren't quite going to tally, if you've got no idea what the final product looks like. Also, they have nearly no time to brainstorm and develop their ideas, and the schedule is brutal - though it looks like the process takes place over many weeks, it's actually a matter of days. The contributors are running on empty the whole time, so it's no surprise that they come up with terrible ideas. The only scenes they do any re-shoots for are the piece-to-camera comments from the contributors, and the reaction shots from Karen and Claude. They wouldn't re-shoot any interaction between the contributors, due to a lack of time as much as anything else.