I would like to try out more TIE advanced squads, but they're kind of expensive to run. Still, I think Concussion Misiles are much more useful than Proton Torpedoes.
As to your Proton Torpedo musings, I think Wedge with Torps is pretty killer. I used Horton with double torps to good effect in the AFM Vassal tournament, though in one game he failed to get any torpedoes fired off. Fortunately, Wedge had a torpedo to fire as well, and his target rolls one less defense die, which makes the torpedoes pretty deadly. I'd sooner keep the second torp on Horton than give it to Luke.
Wedge and Salm are probably the only pilots who can pull off torps, but even then…
And now for some Imperial propaganda. You can run a 5 ship squad with Vader and Steele and play a fairly versatile game….when you also add Squad Leader and Night Beast. The question your opponent will be asking is, "Is Vader going to take his second action, give it to Steele, or give Night Beast a potential 3rd action? Of course, this build gives you no missiles, but it's still a better balance between offense and defense than you'll see with those scummy rebels. Try two Academy pilots and Marksmanship on Steele. Oh, and shields.
You still have enough ships to focus fire on targets, muck up rebel movement, and be generally scary, too. 8 TIE swarm is a shotgun filled with bees. A build with two Advanceds is more like a game of cat and mouse where the cat constantly evades and the mouse has to blow his focus tokens trying to get hits.