There's a lot of lament regarding a certain ship's inability to complete a helical roll around a straight flightpath (thanks Wikipedia) but there's a larger issue here. In a zero-g environment, ALL ships should be able to do it. Hell, even if you reintroduce gravity AND aerodynamics, pretty much every airborne craft that flys can do it...even the lumbering 747.
So why not let every ship do it? You can let the Space Superiority fighters still do it without penalty, and impose a stress or roll for damage penalty if the ship has too much junk in its trunk to pull the maneuver off gracefully in a fight. That's the key here. The ship should be able to comfortably execute the move dynamically without stress to the pilot or the craft. We've all seen that .gif of the Xwing pulling a barrel roll off in combat, so FFG goofed there...unless they're thinking that the ship couldn't do it without incurring stress (as they do when using Expert Handling).
Yeah, it steps on the toes of EH, but so what. If all ships could barrel roll, EH can now make the BR stress free for everyone.
Is this one just too whacky?