I feel that if a player throws an exhausted heavy, even if it's uninterruptible in normal circumstances, that a GB slapping against their open chest 2 seconds before the attack hits should definitely land. Watching a PK bite on an overhead in full grandpa mode and thumping her in the chest with a GB, only to stand there like a **** while it lands is infuriating. Any class really. Reward us for making an exhausted player bite in more ways then just waiting to parry. Allow the GB to land.