I like this OP and considerations given by other posters, good stuff!
I personally enjoy playing both of these ships, and have taken second place (on tie breaker points) in two events so far using the same list:
Lambda, Vader
Vessery, VI
Echo, VI, FCS, Recon, ACD
Having both Vessery and Echo shooting at PS8 is fantastic, and gives the Doomshuttle something to do (provide target locks for Vessery) on turns when it doesn't have a shot. None of the ships give up their points easily, with the Defender playing in the rocks for 4 green dice with a focus, Echo being Echo, and the Shuttle freely able to accelerate out of trouble, forcing someone to chase it (and in turn, be chased by V&E) or give up and try to engage the fighters. It pushes out good consistent damage with 7-9 dice all with Focus and Target locks pretty much every turn, plus whatever the shuttle manages. Anything that survives with 1-2hp becomes instant Vader bait, and the Lambda does a great job of messing with formations just by flying right into them and tanking the hits while the others go for the biggest enemy threat.
Is Vessery the "best" 36pts ever spent? No. But in this list I wouldn't trade him out for any of our other options at the moment. A Firespray is too clumsy without EU. Phantom is too expensive. TIEs (Bombers and Fighters) give up their points too easily. The Advanced isn't fixed yet. Squints can't hold their own against Turrets the way the Defender can. In this list, the Defender is the best choice, and he works well within it. It doesn't make him objectively good, but there are places for them, you've just got to find the right list to drop them into.