TMP was a soft restart to the series- not a re-imagining as JJ put his version.
That's true -- but TNG, as Roddenberry saw it, was somewhere in between. Later producers married the TNG era more tightly to TOS/TAS continuity, but if Roddenberry had stayed in charge, it probably would've continued to disregard or diverge from TOS canon. And if, somehow, he were alive and fit today and asked to reinvent the original series with new actors and a new continuity, I really don't think he'd have a problem with that.
TNG's second episode was a direct reference to TOS. The first episode featured a direct cameo from TOS! TNG, when Roddenberry was at the helm, didn't diverge from TOS canon. (Unless you count the fan works and TAS.) If anything that just showed Roddenberry was more controlling about his work. You're projecting your own beliefs onto what you want to believe at this point.
For example, I don't know how you can say "I really don't think he'd have a problem" considering Roddenberry had a problem with a lot of modern Trek. He had major issues with Star Trek VI which was probably the last Trek thing he saw. You think he is going to enjoy seeing James Kirk the disrespectful annoying frat boy? There was absolutely nothing Utopian about the Abrams farce.