Re: Surviving Vulcan Elders.
I can see Old Spock giving advice if Starfleet truly needed it, but I don't see him preemptively taking out every single threat to the Federation. Especially since this is a different timeline and his knowledge only applies to a timeline with ships that are smaller and seem to be less advanced. For all we know the new Enterprise could stop the Doomsday Machine will one shot. It would also limit the Federation and interfere with their development. They need to learn how to stop some threats on their own.
Space Dandy! He's a dandy guy...in space.
He combs the galaxy like his pompadour on the hunt for aliens.
Planet after planet he searches, discovering new creatures both friendly and not.
These are the spectacular adventures of Space Dandy and his brave space crew. In space.