I finally got a TIE Aggressor and managed to get in two games with it in one day. The list I ran was as follows;
Rexlar Brath; Expertise, TIE X7 and Twin Ion Engine
Colonel Vessery; Veteran Instincts, TIE X7 and Twin Ion Engine
Sienar Specialist; Twin Laser Turret, Lightweight Frame
All I have to say is it's definitely not a meta shaping ship, but for 25 points it acted as a very good annoyance.
The first game was a 2v2 200 point match where each player got 100 points to play with, so this wasn't really a good testing game but it gave me a chance to learn how to fly it.
The second game was against a friend of mine who almost always flies Rey plus something else, this time it was a Resistance Sympathizer with I think it was Bo-Shek (this list took him to top 8 in a 30 person Store tourney) Both Vessery and Brath did what they do best and the aggressor plinked away shields from the safety of the asteroid.
It's definitely not a good missile carrier like they tried to make it unless you go with the high PS pilot, but it has a place as a relatively cheap annoyance.
Since imperial can't get a true Biggs pilot to protect the valuable ships we have to settle for the annoying bee that will sting if left alone.
In both matches that's exactly what happened, either my opponent spent time trying to kill the aggressor when it just ran away and my Defenders lit the targets up, or they spent time trying to kill the Defenders and the Aggressor just dealt tiny bits of damage.