I've come to the view that introducing a long lost brother was a good touch. It's giving the Vulcans a satirical tickling. They, on the one hand, obey a very vigorous logic and yet on the other they are a traditional people hamstrung by traditional taboos. The emotional half brother would be "embarrassing" for the Sarek clan so much so they might plausibly clam up about Sybok and Vulcans being Vuclans they may take that taboo to the max and never mention him at all. Additionally the way Sybok is such an immense challenge to Spock. Sybok has an easy charisma and everything appears to flow naturally to him whereas for Spock life is a permanent struggle not only with the fiery passions of his Vulcan nature but with his human side. Sybok directly challenges Spock in some fundamental ways and he throws him for a time until Spock rises to the challenge and eloquently rebuffs Sybok's attempt to unwind the triumvirate that is the pivot of Trek and we see that relationship at its height in the close of their careers. That is high stakes.
As for the whole FX saga, frankly I never noticed anything too much amiss. Pre-CGI can be iffy in many films and these days I'm kinda jaded by FX that is too flashy. I did notice the dumb turbolift scenes and I noticed Sybok's hair got a very vigorous cut before he beamed down to met the Big Cheese. Can't look scruffy if you're going to met the boss I guess.
As for the whole FX saga, frankly I never noticed anything too much amiss. Pre-CGI can be iffy in many films and these days I'm kinda jaded by FX that is too flashy. I did notice the dumb turbolift scenes and I noticed Sybok's hair got a very vigorous cut before he beamed down to met the Big Cheese. Can't look scruffy if you're going to met the boss I guess.