Not to be a contrarian as I agree TTar is a good check butHave you tried using AV ? P good mon.
252 SpA Choice Specs Latios Aura Sphere vs. 252 HP / 252+ SpD Assault Vest Tyranitar in Sand: 168-200 (41.5 - 49.5%) -- 84% chance to 2HKO after Stealth Rock
Think Latios is disgusting vs balance, right now I agree that revenge killing it seems to be the only method to deal with it. Feels similar to Mega Medicham or Mawile last gen where it gets a guaranteed kill every time it comes in and its speed tier makes it easy to do so. Definitely think Latios is going to become even better as the metagame progresses.