In the PT they got Anakin being arrogant right but they forgot that he needed to be a badass and likeable rogue to counteract this character trait so, we the audience would identify with him.

Sound familiar?

That's because that character is Han Solo. Han starts of the OT as a massively arrogant, sarcastic guy who I'm sure is convinced that his ship is like a gleaming Silver Naboo royal starship but is infact a barely functioning old rust bucket that only goes to Hyperspace if you hit it! But because he is such a badass and likeable rogue we love him (And the Falcon!). Through his new friendships he becomes a better person and joins the rebellion.

But if I was on the Jedi council I wouldn't let Han anywhere near the Force. You know Han would be taking "THE QUICK AND EASY PATH" to the darkside as soon as you handed him his robe. Han is the kind of "SIMPLE TRICKS AND NONSENSE" kind of guy that would fall into that trap.

So if GL had made Anakin this type of character, his fall would've been entirely believable and all the more painful because we would've been rooting for the guy for the past 3 films.