If you could change ONE thing in The Hobbit triology

[Nerwen]

So just to recap, here's where I'm coming from:

It is more usual to adapt a novel of "The Hobbit's" length into a single feature. (Please can we just accept this and move on?)

1.) Why do you think "The Hobbit" requires a (much) lengthier treatment?

2.) How would you go about this without either invention or padding?

Again, I am not trying to prove you wrong, I'd really like to hear what ideas you may have. Apart from everything else, I've always considered the "Hobbit" trilogy's central problem to be the fact that it was a trilogy in the first place, so I'm interested in this new perspective.