About Han exploiting situation to probe Leia’s emotions for him… I simply meant that he used the fact that he had to go pay Jabba (no, he didn’t make it up), to see how she will react to the possibility that he might not return.

Anyway arguing over interpretations is pointless. The fact is that ESB script does not (explicitly) explain/explore Han’s decision at the end of ANH.

As for ROTJ in terms of Han and Leia, when it comes to a romance in general the most interesting aspect is everything before the love is professed. After the love is professed the entire thing becomes boring from a dramatic/character point of view. ROTJ was left with very little to work with after ESB. It tried to make a little complication with the Luke but the main potential was already used in ESB.