Sounds like a lot of effort to get Fett in a position to be shot for no reason.
One of the problems with Jedi is everything is tied up in a big funeral bow, Jabba, Fett, Yoda, Palpatine, Piett, The Empire.
It would be add a bit of cred to the film if at least one loose end was left dangling and Fett is essentially a minor character (all be it a fan fave).
He's not evil or good or political, he's just in it for the money which he could continue to make in chaos after the fall of the Empire.
So why not just let him live?
People seem to think he is Han's nemesis, he isn't (outside the EU anyway) he was just some guy hired by two other guys to find him.
He is a bit of a shadow of Han (Han pre-ANH with a few less scruples and a mask), he has the fancy ship and all.
Having him sell the location of the Emperor to the rebels gives him something to do but outside that I can't see any point him being in the film.
The Bothans don't appear anywhere in the films so having Fett take up that role makes sense to me.
It's annoying when writers feel that they have kill off anyone who isn't a hero in these sort of films I thought (until ROTJ) Star Wars was above that sort of thing.