I only gave in to the OOT side of the Force after the GOUT DVD's came along. It'd been forever since I'd seen the OOT but watching it again, man, I get it now.
When I first heard about Hayden being tossed in to ROTJ, being the pro-SE/revision guy that I was, I didn't have a problem with the fact of Lucas doing it. I thought the integration left much to be desired though.
Nowadays, I wish it'd been left alone. It's a moment that Anakin has earned. He was born as a slave. Then he was "freed" and became a slave of the Jedi. Then he was "freed" by Palpatine and became a slave of the Sith. Through out his whole life, he's been a slave to his emotions.
Death was his only escape. An act of love, heroism and self-sacrifice, for the first time acting on someone's behalf strictly for their good, was probably the one wholly decent thing he ever did his entire life.
Reunited with his mentors and surveying the hero and Jedi Knight his son has become, Anakin has every reason to feel pride and joy...
... all of which is completely thrown out the window when Hayden is thrown in there. I dig the prequels and everything but Hayden simply has no business in ROTJ. None. Zero.
Worse, it's pretty obvious that Lucas didn't actually shoot him specifically for ROTJ. Most likely, Lucas took some random footage of Hayden from the ROTS production, maybe Hayden between scenes, and then had someone badly paste him into ROTJ.
All in all, I wish Lucas had left Shaw where he belonged. Old Man Anakin has earned that moment with Luke; Young Anakin hasn't... which was sort of the entire plot of the prequels.