Very little of Roddenberry's initial idea existed after he handed over the day-to-day oversight. The only reason Enterprise was in the same universe is because it involved a spaceship named Enterprise in the future. Pretty much everything else about it contradicted something Roddenberry himself produced.
Care to back that up?
The Romulan War was fought with primitive atomic weapons and the ships didn't have any view screens. The Vulcans were xenophobic dicks. Etc etc.
Honestly, if you're going to quote, quote accurately:
Mr. Spock: "As you may recall from your histories, this conflict was fought, by our standards today, with primitive atomic weapons and in primitive space vessels ..."
(ie who know what type of 'atomic weapons' (if any) are used by StarFleet in the 23rd century - but nothing shown on ENT contraduicted this particular line.)
Mr. Spock: "Which allowed no quarter, no captives. Nor was there even ship-to-ship visual communication. Therefore, no human, Romulan, or ally has ever seen the other."
(Spock states: "Nor was there even ship-to-ship visual communication." That doesn't mean 'no Viewscreens' per se. He also talks about 'allies' and prior to ENT there was plenty of fan fiction that had the Vulcans, and other founding member races as Earth allies during the war; so hell, in that context, the line - "Therefore, no human, Romulan, or ally has ever seen the other.")
Lastly, TOS itself is chock full of internal dialog contradictions - and this was while GR was in charge of the show. My point, if you're going io try and crucify later productions for 'contradicting something Roddenberry himself produced...'(paraphrased); you might want to start with the fact he effectively contradicted himself on a regular basis on the original Star Trek itself.