1. One, it's less likely in this aircraft, due to the physical separation of the engines (single round/burst won't take out both, 1 shedding turbine blades won't hurt the other, etc). The likelihood of both quitting at low altitude, WITH NO WARNING (surging, sputtering, whatever), is what's incredibly remote. If I suspect that I have a problem that will affect both engines, I'm either putting it right back down if able, or transitioning to airplane and assuming an emergency profile designed to take maximize APLN-mode flight to landing. Once I'm in APLN, my survivability in the event of a dual failure is at least as good as a helo.
2. In airplane mode flight, sticking one's head out isn't really feasible to start with, even if you had an open hatch--I don't think you could keep your helmet on at 200+ knots. Once the nacelles are up, they can open up a half-door to get better vis, or more commonly, look out the ramp. But yes, a lot of them would like bigger windows, and I believe they are supposed to get some later on.
3. Nope