For me ROTJ is more of a problem than any of the PT because all the PT films are, in their current form, so badly made I can barely watch them but the OT has two really good films and a poor film with some really nice moments.
Mark's performance is really good for example.
I can't dismiss the whole film like a can with the PT but it doesn't maintain the trajectory of quality that the first two films had .
It will always feel like the contractual obligation film (both for the film makers and this member of the audience).
I need to watch it to complete the story but I feel let down by the drop of quality which prefigures much of what is wrong in the PT.
If I let ROTJ off the hook for it's hideous and avoidable flaws I might as well watch the PT as well.
I want the original version released because it's less of a mess than any of George's SEs but if any SE can fix it (and I doubt if George is the guy for the job) I would at least have one trilogy I can watch all the way through without being weighed down by what the final act isn't.