I agree with the premise that Spock should at the very least share advanced technical knowledge with SF.
They lost more than enough ships to Nero (Klingons as well) which can also have negative consequences for some large scale conflicts in terms of wars, so helping everyone to rebuild fast would be good.
Perhaps Spock doesn't have to tell SF everything about major threats that might happen.
He could say that several things happened in his timeline that ultimately presented a major threat to Earth, but that also with Vulcan destroyed and so many things altered, numerous aspects (as far as the Federation goes and other events in the A & B quadrants) could unfold in a far different capacity.
Therefore, if the 'prime Spock' knows he has no means of going back to his own time-line (Slingshot around the sun anyone?) ... he will likely stay in the past and help rebuilding Vulcan among other things.
They lost more than enough ships to Nero (Klingons as well) which can also have negative consequences for some large scale conflicts in terms of wars, so helping everyone to rebuild fast would be good.
Perhaps Spock doesn't have to tell SF everything about major threats that might happen.
He could say that several things happened in his timeline that ultimately presented a major threat to Earth, but that also with Vulcan destroyed and so many things altered, numerous aspects (as far as the Federation goes and other events in the A & B quadrants) could unfold in a far different capacity.
Therefore, if the 'prime Spock' knows he has no means of going back to his own time-line (Slingshot around the sun anyone?) ... he will likely stay in the past and help rebuilding Vulcan among other things.