All you basically did V-wing was change one line of dialogue and just have one Han hit Boba Fett intentionaly. Here is the problem.
The whole point of Luke's rescue attempt was to show that look had matured as a person top where he didn't need Hans help. If Han does it intentionally, then Han can say that he rescued Luke again. It takes away from the line "Thanks Luke...thanks for coming back for me. Boy do I owe you one!!!"
You guys have to understand for the whole rescue attempt seen to work, Han solo has to be incapacitated and vulnerable to a great degree in order to:
1. Make Luke's growth as a person more concrete
2. To show Luke's growth as a Jedi
3. To give Han an impetus for his stry arc, the man who always went at it alone, needed his friends to risk everything to get him.
I mean really v-wing, I don't think the Boba Fett demise is a problem. It's humorousness actually fits in pretty nicely.
Also, even if you did change it. I don;t think it really changes the scene that radicaly to be honest. I am not disputing that your retcon of that scen would be bad. In my mind it just isn't that big a deal, when you consider there were other more better and important sequences following it.
There are only two aspects of ROTJ that I think anybody are bad and everyone has a legitimate grievance on
1. Chewie's tarzan yell. That was pure garbage and ridiculous. I would be in favor of removing it. But it is such a short scene and I alone really noticed it until someone brought it up on this site. I mean it is so brief that leaving it in would not really make a difference.
2. The Sarlac pitt burp. Not necessary. But again brief and doesn't really affect the story that much.
That's it. Everything else about ROTJ i chalk up to individual tastes, unusual expectations and excessive nitpicking.