All that could have been avoided by having a drop pod launched to the surface containing a mechanical avatar. The crew member just sits down in a chair to remotely control the avatar using an FTL link for instant control. Of course the avatar has a hologram projector so it looks exactly like the crew member. But that would be too safe and not dramatic enough.
That would make for an interesting story concept. It'd be cool to see the avatar, after exposure to various people occupying their body, begin to form it's own consciousness with shared traits.
Not quite. The avatar being used is a blank slate, whereas in Dollhouse they added personalities over the existing minds. What you've suggested is more akin to what the hirogen did on Voyager.
Something went really wrong with computers after humans for warp. That's why you can break any evil one by acting crazy or telling it to calculate pi. Also why Data doesn't just wifi.