I would have to defer to the playtesters, and since I don't yet have my book, go only on the results of this thread. But unless there is something I am missing, a one-shot, 6 dice ap triple dammage mine which can't do criticals, and one additional attack dice for the primary beam seems marginal. The G'Quann already seemed like it was undergunned for a signature race's heavy cruiser. At least now, it serves to keep enemy fighters at bay, and with the ship breakers varient, capable of delivering some real punch.
Am I seeing this incorrectly?