You know, this just doesn't sit right with me. If Shia just came out and said his piece on why he feels he dropped the ball, that is one thing...but he goes and drops Harrison's name too....so now Harrison is going to be faced with that round of questions, along with Steven.
It's just unprofessional. Shia should just let the film speak for itself, and not drag others into it.
Now, back to the vine swinging...
As mentioned before, I am of the belief that you can sell the most ridiculous concept with the right approach. The vine sequence in Kingdom could have been pure adrenaline. Imagine a first person perspective, practical, with the speed and rush of being that high off the ground and the elements racing past you with each swing. I really believe they could have made the vine swinging as exciting and as white-knuckled as the speeder bike chase in Jedi.
I don't blame Shia for not selling that scene. I blame the lack of creativity in the execution.