Maybe there could be a repair zone where repairs are enabled, but then it would be like people shooting out of spawns except tanks. I don't think that would be much of an improvement.
I will say though I agree that it's pretty easy to find cover to hide behind and repair up to full, and then there are harassers that can do that while moving as long as no one is shooting HE near them (splash can kill the backseater but doesn't damage the harasser itself)
I'd really like the Flash to be improved some. Not it's ability to get kills, but it's ability to travel safely at decent speed on non-flat terrain, preferably with stock hill climbing at least as good and hopefully better than the harasser is now. I wouldn't mind seeing them be able to muscle their way up steeper inclines than other vehicles. I'd also really like for it not to explode on landing after a particularly righteous turbo jump. Being able to now tilt the flash in midair means I usually land on the wheels or at least the rear (due to angle of launch) and then the wheels, but the flash just explodes anyways. It's kind of funny exploding the way it is now but it would be better if I could drive away from it. I usually only drive it to boost morale of a moderate to large friendly zerg with a death defying turbo jump up the nearest terrain with a sufficiently steep angle. The flash is so suicide prone that I'll just redeploy, squad deploy or wait for a sundie to go up instead of using a flash to go to a base <500m away even.
I really like turbo jumping when some random person gets on the backseat. I can't resist showing them what the flash can do. Too often though they lose faith in it and bail out to their death when they see the ground receding like they are on a spaceship taking off and to be honest I can't blame them sometimes because it's fairly likely to kill them anyways.
Turboing a hill and landing inside a small number of enemies is roadkill city though. I had that happen the other day where I careened spinning through a narrow passage between a rail and a spawn room and ran over a few TR on the way through, then got stuck for long enough to Affirmative and then absconded successfully with the surviving TR shooting at me.
I use Racer 3 and second to last turbo boost rank, perhaps without that setup the flash is less prone to explode upon landing though I'm not sure.
It would also be really cool if it kicked you off if you land upside down, perhaps smote your shields to empty and a little bit of health, and then either tumbled or slid a ways in relation to it's inertia at which point you could flip it and drive it again. I wouldn't mind if it took a bit of damage too, though catching on fire would be a bit much. It would make the flash a lot more enjoyable to drive if you didn't have to worry about two or three ways to lose your flash, easily capable of leaving you stranded or dead somewhere between your destination and the place you departed without having anything to do with an enemy realmer. That's what friendly fire is for.