Transforming into a wolf in
TP really didn't change the gameplay at all. You were controlled the same, and you played the same way as a human Link that can't use items. The trasformations done in Majora's Mask were far more interesting, and it mixed up the gameplay a lot more.
I would like to see trasformations in future Zelda games, but only if they are creative and mix up the gameplay. Transforming into a wolf or becoming mini are extremely lame transformations. If Link is going to transform, give him an ability that he can't do as human Link; for example: jumping, flying, or swimming Zora style.