Wow, I'm shocked that you've accomplished so much already. Especially since you've done it all yourself without much help.
It would probably take forever to fix every bad frame, and to be honest considering how old the film is and the condition it has been kept in, it probably wouldn't be worth the effort considering all the other quality problems it would still have. Just fixing the big stuff is enough.
I think it's a great idea for you to release the complete 'long' version as a bonus disc, especially for people who have never seen it that way.
If you don't find anyone for quality control, I'd volunteer (although I'm all the way in Canada). I'm somewhat familiar with the old VHS transfer and I have a copy of the 40th anniversary version if that's what you mean about the original DVD.