I still don’t know why that makes TLJ better than RotJ in any way. Luke and Vader were the only characters that still had something worthwhile to do character wise because Han and Leia’s character arcs were done and they decided to take the safety route with them while going very risky with Vader and the Emperor. Apparently you think that that makes TLJ superior to RotJ. Ok, good. Am I correct? Is there more to it?
The problem was that they apparently decided Han an Leia’s stories were done already, which is silly, they easily could’ve given them more interesting things to do. I also fail to see what is risky about the Vader/Emperor plot, though I also don’t exactly understand using the word risky in relation to quality.
Anyway, yes, across the board characterization in TLJ is better than ROTJ, which in turn makes the film itself better.