Right now, Rebels have only two ships that can equip Systems: B-wings and E-wings. It's been pretty conclusively shown at this point that piling points on B-wings is not a great strategy, and with only 1 AGI, lots of ships can still push damage through even if they can't spend the Focus. E-wings are largely absent, except for Corran, but he wants either FCS or Advanced Sensors.
The U-wing has an extra AGI over the B-wing (most of the time), and seems decently priced. I expect it to be faster, as well, simply because the B-wing is one of the slowest ships in the game, so it's got to be faster. If the ship ends up being an important support ship, the Sensor Jammer is very useful for keeping it alive and/or forcing tokens to be spent, opening up enemy ships to your attacks.
Some interesting ideas:
Zeb with Cassian on a Sensor Jammer U-wing, with Ion Projector. You go for a block and block a ship. That ship has no actions. It shoots you at Range 1, but loses a hit to Sensor Jammer and you've still got 2 dice + Focus to defend if needed. You get to shoot using Zeb at a tokenless target. If Ion Projector triggered, you pull a stop and repeat.