TLT's issue isn't its raw power. The raw power of it is reasonable at 6 points. It would also be reasonable at 7 points.
TLT just has such weird mechanics that it interacts with more and more cards and turret-carriers to go way beyond its base functionality.
As an analogy, consider Push the Limit. Push the Limit is a reasonable card at 3 points. But on certain ships, it is worth far more than 3 points, and with certain slots it can be worth far more than 3 points (Advanced Sensors), and on one ship in particular it's so good that the ship was always basically a 30-point ship.
TLT started with that sort of synergy (Miranda), but as the number of pilots and upgrades have exploded, more and more of them have emerged, and will continue to emerge, and some of those are going to get downright abusive.
Basically, TLT is complicated, and as it interacts with an increasingly complicated game, things are getting ugly.
I don't know that nerfing TLT is the answer to this. (In fact, I'm pretty sure it isn't.) But I do know that it is the easiest thing to see in the spinning gears and cogs of dominant lists, so I think it's almost certain that's what FFG will do.