The second half of TLK could have been a lot tighter. While Hakuna Matata is awesome, the other Timon and Pumba scenes tend to drag. Also, as Talisman said, Adult Simba never fully regained the charm and chutzpah of Kid Simba. As for BatB, while the pacing is a lot better than TLK's, replace the transformation sequence with something mundane, and you end up with a movie that is far, FAR less impressive.