I liked the character of Sybok (and Luckinbill's performance). (ducks)
I wouldn't mind a new take on him if the Kelvinverse was a TV series rather than films (a neat, but low-key idea when one has the luxury of dozens of episodes). I'd likely read a Kelvinverse novel with a new take on Sybok. The character has potential (even if it was not fully realized in Final Frontier).
I imagine he's wandering around, in exile, but perhaps in a darker, more bitter state of mind (surely, given the TOS incident where Spock senses the death of a crew across a great distance, Sybok sensed the death of Vulcan). The more I think about it, the more interested I'm becoming in some exploration of the character in the Kelvinverse. Exploring such a character, I think, would be right up Abrams' alley. Who knows? Maybe a fifth film?