But what about the psychology of the surviving Vulcan? Could Vulcans experience many emotions simultaneously but control them all at once? Could they have multiple attitudes and multiple thoughts working in parallel? Perhaps I have missed the latest novels with more alien diversity. If an alien species controls their emotions, they can still, if necessary, but rarely, express emotions. This does not take away from the emotional control but enhances the rarity of expression.
I think that the TV series, never mind the novels, have established pretty conclusively that Vulcans do have emotions but simply manage them very tightly. The TNG episode "Sarek", which featured various Enterprise
-D crewpeople including Picard, being affected by Sarek's inadvertant telepathic broadcasts proves the point, as does the relatively open display of emotion by Romulans who split from Vulcan just a couple of millennia ago.