The U-Wing seems like an amazing support platform that can still hold it's own in a fight. But If feel like it can be a bit situation with the stress mechanic... It's purpose can either be to clear stress or share focus. Then you add in a wack of amazing crew and upgrade options and things get even more interesting...
Here are some of my ideas:
Rey (45)
Expertise (4)
Finn (5)
Bistan (2)
Engine Upgrade (4)
Millennium Falcon (TFA) (1)
Cassian Andor (27)
Snap Shot (2)
Fire-Control System (2)
Kanan Jarrus (3)
Inspiring Recruit (1)
Engine Upgrade (4)
Pivot Wing (0)
Total: 100
I posted something similar to this before, but a little less offensive. This one helps with dealing with Rey's #1 weakness... stress. She hates it, she falls very quickly when stressed. Cassian can do quite a bit of damage, takes stress of of Rey numerous ways...but maybe he has too many tools to lift stress between Kanan, Recruit, and his own ability. Sure he can use it to unstress himself as well...but thats three different ways to take the edge off. Obviously he has to hang out near Rey.
Rey gets Finn, Bistan, and Expertise. This is a stupid amount of offense.... And since Cassian will keep her stress free, she hsould get pretty constant use of Expertise and her natural re-rolls.
Han Solo (46)
Wired (1)
Ezra Bridger (3)
Bistan (2)
Corran Horn (35)
Push the Limit (3)
Fire-Control System (2)
R2-D2 (4)
Engine Upgrade (4)
Total: 100
This is a play on my "usual" list combining a stressed out Han and Corran in his standard loadout. Corran is still Corran... Han is still stressed, but now with Bistan, Ezra, and Wired I should get some big hits in. Han's ability will probably not come into play as much as usual here... so maybe I should try using new Han just to throw people for a loop 
Corran Horn (35)
Push the Limit (3)
Fire-Control System (2)
R2-D2 (4)
Engine Upgrade (4)
Cassian Andor (27)
A Score to Settle (0)
Kanan Jarrus (3)
Jyn Erso (2)
Pivot Wing (0)
Green Squadron Pilot (19)
Crack Shot (1)
Chardaan Refit (-2)
Snap Shot (2)
A-Wing Test Pilot (0)
Total: 100
After a ton of deliberation I'm really like this build... Corran hates stress as much, if not more so than Rey. He also likes to reposition, but still have his tokens... So why not have Cassian take away his stress, Jyn give him some Focuses, and then have Kanan around to help lift stress during the whites if needed too? Or should I swap to Jan so Corran can not only get focus/evade hand off, but also be able to get full re-positioning. That's equivalent to 4 actions people!
Oh, and don't forget about the A-Wing doign snap.crackle pop like things.