That's an actual idea that would give both tension and weight to the story. That isn't allowed in ROTJ.

I guess it could be argued as part of Palpatine's ego that he would have to build another DS in order to repair his standing in people's eyes because the first one had been destroyed. Or maybe it was all a MacGuffin to get the Rebels all in one spot to get them completely wiped out and that is the reason why it is "tied" to the planet Endor.

But I don't think so. The destruction sequence does look great-but when Wedge and Lando get to the reactor it's just in a big empty chamber and sounds like a broken plate of glass when destroyed??