I agree with these ideas, I think they would make these areas much more interesting and fun for players to explore. When I first went to Boomtown during Beta, I had to hover through most of it because we were afraid to touch down. Never have I felt so awe inspired at destruction and the music.
Faultline equally scared and awed me. I LOVE this zone. I think it's one of the most well done areas. It is scary. If you fall, you fall for a long time, and into a very unhospitable environment. For me that is a part of the fun.
I think zone monsters are good things too. Not necessarily the Kraken, but some that are HUGE and nearly unstoppable. Finding ways to sneak past them (don't make it impossible, but definitely not easy) to find a way into some missions.
I also think there HAS to be more indoor missions in the Hazard Zones. Especially places like Faultline and Eden. How fun would it be to go out to Eden and have to "break" into the Utopia Complex.
Also I think that Vicious Rikti Monkey Island should have missions out there.
Okay those are my thoughts.