Halo is all well and good until a smaller part like what struck Massa smashes into a drivers face, or like the example of a car coming over the top what if a piece of carbon gets wedged into the big gap in the halo and has nowhere else to go but into the driver?
Whether you think its ugly or not, the fact is it is no where near 100 % safe, at least a screen like indy car is heading towards 100% safe ie it will deflect pretty much everything.
For me, i think its a lot of effort for something that can only deflect wheels (they are tethered anyway) and other cars coming over the top.
Drivers sit so low down these days anyway they could duck down and avoid most stuff anyway.
At least the screen can become part of aero dynamics...
As soon as you put a screen on an F1 car it looks like the future.....the halo looks like something a banger racer would do.