I don't particularly mind the fact that we return to Tattooine in ROTJ. For the relatively small scale events that took place throughout the OT, it was nice to return to Luke's homeworld to juxtapose where he was in ANH, to how much he had changed come ROTJ.

And don't forget that Jabba was already closely linked to the planet in ANH. The special edition Jabba scene was clearly in the original script, so Lucas had at least planned to set up that association.

Being a middle of nowhere rock is what made it so attractive to the gangsters and 'scum and villainy.' So using the planet as a hideout for Jabba doesn't brother me. But in TPM, it almost seems as if the Hutts are running a government, and that Mos Espa is a bustling city with a healthy economy, and prominent social scene, and some sort of governance by the Hutts, which contradicts everything that was said about the planet in the OT. Jabba was gangster and a criminal, his palace was a hideout, and Tattooine was meant to house a few small space ports that thrive off of the criminal going-ons that take place there. Mos Espa completely ruins that.