Yup right. If you have Skiffs (and/or a Juggernaut) in your Rebel SC, they can help much to stop uninspired attacks.
There's not much to do though about looting attacks. An eAT-AT (maybe + more AT-ATs) + air strikes can take some loot/contraband. Or they can catch a medal (giving protection) by throwing 3 TIEs at your SC after the eAT-AT killed the shields.
But there's not much to do against better attackers. But if you spread your shields and base a bit, you can usually avoid a 100%, because AT-ATs are dead slow.
Some images for your amusement:
And an animation of a Juggernaut chasing some AT-ATs. It finally wins the show down with the eAT-AT.http://i.imgur.com/MYyMIdo.gif
I don't win defenses very often but watching the SC to make the "cows" ready for barbecue is always fun.
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