Humby said:

I've personally never had issues with the plot of ROTJ. I always thought it tied things up nicely, which is exactly what it was meant to do. Aside from its lighter moments and lack of death, ROTJ has a very heavy weight to it.

Removing some of the sillier elements like the dance number in Jabba's palace,

You must be thinking of the Special Edition...

I wouldn't have changed much. The biggest thing would be not making Luke and Leia siblings.

If we want to talk about some radical changes we should look at ANH. I would have had less dianoga.