A refueling wing may be useful for Talis, since they won't be able to operate off of anything smaller than an escort carrier. Some kind of planetside logistics and ops group may be required as well, since most of the time they'll be rearming and repairing at a forward operating base rather than aboard a ship.
Come to think of it, I don't think Retaliators are going to have much in the way of combat endurance because of that. The art we've seen so far suggests we'll get eight torpedoes that will last for maybe two to four attack runs, and then we'll be gunboats at best. That means the Talis are going to bring a lot of heat in the first few minutes of an engagement, but become liabilities after. Gladiators only get the one big torpedo, but they can keep up a slow, steady bombardment by rearming on smaller capships.
I'd really like for the Retaliator to be able to serve as a missile bus, too. Imagine rotary racks of size 3 missiles in the bays, and target designators on the turrets. You could just roll through the battlespace spewing rocket propelled death at anything approaching within 4 klicks. Glorious!