I never see anyone take any of the Tie Advanced generic guys. Why is that? Oh, I have heard of people taking just 4 Tie Advanced, but I mean just one Tie Advanced that isn't a named. There is one that is a duplicate of the Rookie Xwing (Tempest Squadron) and another of Red Squad (Storm Squadron). Yes, they only have 2 attack dice, but 3 dodge dice and more manuevers. They also have the option for missiles.
Are they worth taking? Do you HAVE to use the missiles to make it worth it? It seems to me that you need the missiles to maximize, but you don't have to have them. They are just sturdier Tie Fighters that way. Their movement is slightly different, but not worse. It's also nice not to be pilot 1.
Thanks for input!