As a personal owner of the new IMG GB, that thing is awesome.
6 forward and 5 everywhere else coverage, thin as they come, agile as a Tridente, medium powercore, and more hull than a damn Imperator. A CAU5 IMG GB has more armor than my CAU8 KuEx. I expected to see them everywhere, they're one of the best of not the best GB in the game ATM.
Perhaps IMG| should invest in some? I think you'll find yourselves satisfied.
Anyways, we can discuss elsewhere. Main point: GBs are balanced.