I have done everything I can to make QTC's work, and I can't make them sing. They have literally been a part of every single fleet I have laid on a table since launch day and they have always left me feeling like I could have used the points better.
Ultimately I feel like the biggest strike against them is the fact that they are big investment toward ship killing in a fighter meta. If you could wind the clock back to Wave 2 I think they may have shaken things up. As it stands, I could take QTC, or I could add another Y wing or Tie.B to the swarm and call it a day. In the end the damage output feels more reliable and also comes with a host of fringe benefits (like hull, engagement power, AS value).