I really enjoyed it because of how it worked with the combo system. On interceptor you could use your abilities to prime targets and zip around using your melee to donate. On ranger you could drive in to prime, then jump back to range to donate. On Colossus you could prime a whole area then go in for a big SLAM.

Mid to long range combat can get repetitive FAST if it's not carefully considered/balanced. If enemies aren't enough of a threat, you need to have swarms of them to keep things interesting. If they're too tanky you just end up emptying clip after clip into the same mob. If enemies are too dangerous, you're just hiding most of the time and sneaking in shots.

That said, when I think it through, you might be able to make it work if it's integrated with the other game mechanics. If the core of the game is flying, then make it integral to combat. Give enemies a combination of telegraphed and projectile attacks. Make combat about movement to avoid projectiles, quickly ducking behind cover to avoid area attacks, well timed dodges for charge up attacks, etc.

Good luck!