FFG may not be happy but I flew a Resistance Transport (Cova Nell) with Leia Organa and Pattern Analyzer along side Poe Dameron and Temmin Wexley in a LGS tournament yesterday and here are my impressions of its performance. I am not the best pilot but I constantly had trouble maneuvering the ship in each game. The biggest drawback is the ship really has no means of escaping because it cannot do a 180 degree turn. This limited Poe and Temmin because of having to try and help defend Cova and Leia. Once Cova was destroyed it freed up Poe and Temmin to do their fancy flying and they were more effective. My last opponent was very effective by taking out Poe first then Cova and still Temmin was able to do some damage to my opponent before dying in the face of a TIE/SF swarm.
My thoughts on the Resistance Transport that it is the Resistance's version of a B-Wing, a slow knife fighter on a suicide mission and the B-Wings don't necessarily have to commit suicide. However, there are no pilots like Braylen Stramm or Ten Numb who fight better under stress. Cova comes the closest with being able to roll an extra dice after revealing a red maneuver. Put two or three of these ships with some T-70s X-Wings or RZ-2 A-Wings and you would have your version of Resistance Beef. Leia, while powerful, would not be part of any list like this because of 1) cost and 2) you don't want to put her in a knife fighter. The only other Resistance ship that can take Leia is the YT-1300.
Again these are the thoughts of a bad X-wing pilot after going 1-2 in a tournament.