For the fact that you could say "Spinal phaser lance? you mean "pop gun'"? Or the fact that "Nothing says 'F*** you" like punching them in the face with an aircraft carrier"?
Cooper as the new Wesley? Not really. Wesley wasn't whiny, he was just an annoyance. The problem wasn't that he was a kid in a setting full of adults ( other kids appearing in the show such as Alexander worked out pretty well in the stories ), it was the fact that they added a "chosen one" aspect ( the Traveller's advice )…