My problem with renaming the desert planet in Return of the Jedi is we already know from watching The Empire Strikes Back that Luke and Lando are planning to meet on Tatooine.
Quite right. We know that the rendezvous point is Tatooine; and so I always took the end of ESB to imply that Lando and Chewie would conduct reconnaissance, determine where Han is being held, and then report back to Luke on Tatooine; or else, report back to Luke and then meet on Tatooine to formulate or action their plan. But this doesn’t come to the same thing as Han, himself, actually being on that planet. Upon watching ESB, there’s really no expectation raised of this; and quite the opposite, I’d argue. Because what are the odds that the rendezvous point - which seems somewhat arbitrarily chosen (“I’ll meet you at the rendezvous point on…[pauses to consider] Tatooine”) - would also just happen to be where Han is located. “It’s always the last place you look, right Chewie?”.
And if the rendezvous point was to be Tatooine because they already knew that Han was there, then why did it take three years or so to precisely locate him? Okay, sure - so Tatooine is a planet; and that’s a large surface to cover. But they have access to spaceships and presumably scanning equipment; and they know that Jabba’s the one to whom Han is being delivered. Given how “illustrious” Jabba the Hutt is - and how ostentatious; the dude’s rockin’ his own palace! - it really wouldn’t take too long to find out where Jabba’s holing up on that desert world.
The only way that the ending of ESB makes any sense, in fact - with Lando and Chewie setting off on their search, and ROTJ then taking place years later - is if Han is not on Tatooine; if Han is actually on some unknown planet, which Lando and Chewie must find.
Indeed if you are going to use Ben’s haunted house it too is on Tatooine.
Oh, I definitely wouldn’t mind returning to Tatooine if it’s narratively or symbolically earned - as it would be in the case of having the conversation between Obi-Wan and Luke play out back in Obi-Wan’s hut. Tatooine as the centre of the Star Wars galaxy is all well and fine, providing that by centre of the Star Wars galaxy you mean that the planet hosts pivotal moments or turning points in the overarching story. If Tatooine is the planet from which each trilogy’s protagonist emerges, then so be it - there’s a somewhat fairy tale quality to that notion. But when Tatooine is also the planet of choice for tertiary events which aren’t integral to the development of the main character or the central thrust of the narrative, then universe shrinkage threatens.