Andoria was definitely a better friend to Earth than Vulcan was. I've often described the relations between Earth and Vulcan as a benign occupation. When things got difficult for Earth, it was Andoria that helped, not Vulcan. That makes me want to side with Andoria.
However, my more level-headed side thinks that joining with Tellar in staying out of it might be the prudent course of action. Earth has its own problems to deal with without getting sucked into a war between Vulcan and Andoria. Plus, if the Vulcans and Andorians weaken each other, Earth will emerge as the local power.
actually it was more shran as an indivual that helped.
the andorians just wanted the proto type of the weapon.
it was shran possibly against orders who sent back the blue prints of the prototype.
i am with hopeful romantic.
try as hard as possible to work things out between the two races.
show that the vulcans very possibly had suffered from romulan space at one time being within the vulcan government until tpau did the great purge.
there already is an amount of trust between sovall and shran and it could be a gateway of working things out.
Ever notice thru the various series and movies, that the more and more we learn of the vulcans, the less "desirable" and more despicable they become? Whatever happen to logical and non-violent, peace and long-life?
actually they always have been complex.
frankly we see both good and bad vulcans as far back as amok time.
stonn and tpring come across as a couple of coniving bastards while tpau is wise and noble with kirk already holding her in high regard.
we learn in journey to babel that sarek though opposed to violence knows who to kill wiht his bare hands and is very capable of killing if he has a logical reason .
so gene , gene coon, dc fontana, ect all had a hand in showing that vulcans are far more complex then the goodie two shows totally non violent image some fans have.