I dunno about that. I think the main reason that no new scenes are added to TOS is because barrel loops and extended FX shots didn't "fit", and the base would freak-the-fuck-out.
Messing with TOS would be like putting Transformers in the Book of Genesis. There would be riots. Geeky riots but riots non-the-less. If someone "adds" stuff to the later series, I doubt few would bitch or moan, as there aren't to many TNG+ "purists" out there like TOS purists.