Personally, I like the Three Caballeros. I think it is an okay ride. However, I think that they should have kept El Rio del Tiempo. I love the Three Caballeros and wish they would have done more than just an overlay type ride.
I enjoyed El Rio del Tiempo because it felt more authentic and genuine. TTC feels like putting lipstick on a pig to me personally.
It's an adequate ride if you're trying to avoid crowds at peak season, but I wouldn't go off the beaten path to seek it out.