I'm the type of guy that can normally just take the changes with a grain of salt and say "oh fxcking well" and move on with my life. This alteration was a little bit much though. Despite the fact that Hayden had an awkward look of "Yeahhh, sorry about all that killing stuff..." on his face, it was just insincere. When I was little, I would cry when I saw Anakin at the end because he looked so peaceful, and so happy.
They should have done something with like, Hayden Christianson fading into the old-guy Anakin. That would have been an acceptable change in my books.