Making Jakku Tatooine would at least go some way towards explaining some of the more coincidental aspects of the ST, such as why a group of Jedi adherents looking for Luke are camped out there. People on Tatooine would have a greater than average interest in the Falcon as well, so a Junk dealer like Plutt would probably want to buy it just to put it out front and attract more business with a famous ship. Also, Rey’s Palpatine parent might have been drawn to Tatooine because of its closeness to the two people who overthrew the Emperor and be drawn to it through the Force.

Finally, Rey’s final scene would have special significance to her since it’s a return to her beginning as well.

Of course I don’t think any of this is feasible due to the amount of times Jakku is name-dropped in the ST.