Considering that 2 attack dice might as well be zero, we already have one. The TIE Shuttle.

It either has to be dirt cheap to a ludicrous degree or have a hugely op support element to be worth it. Even the palp shuttle feels bad as the last ship alone and it deals quite a bit of damage. It has to do something strong enough that it can't just be ignored entirely until the end.

I would not be likely to fly a no attack ship unless it had some insane upside.

The thing to do would be to just house rule a 0-attack Colonel Jendon Shuttle that has Palp, unlimited range Tarkin, unlimited range Fleet Officer, and Weapons Engineer with the ST-321 title, let it do stressless full stops in the corner all game long, and see how well your favorite two aces fare against the enemy with all that support.

If max-level support such as this doesn't win you the game with ease, then the question is answered.

Honestly, I want to try this. Haha.