Pros:

A story!
Reasonable story at that, with logic to each step along the way
Its very own one-off Man On The Edge (each day gets closer to losing his head)
Some nice touches with the suicides
Huge area not just a tube
A witch in a dark maze of twisty little passages, all different, part of my suggestion for how to make a scary campaign!
A visible helicopter arrival and highlighted access route
Resupply just when I was starting to worry about it
Long without repetition or grind

Cons:

Glowing golden desert with incandescent milk river in the bottom of the canyon
Bullet-proof air, particularly in the open-sided jeep
Ladder to helicopter is partially underground and the glow shows it
One place where I felt like I could be there an hour waiting for a moment to climb out of the hole, which I could have chanced with human team-mates but not with bots
Lost all three bot team-mates because the one place I didn't expect the pick-up was the helipad that already had a burning heli on it, we were at the supply room and they stayed there to fight rather than running with me when I saw where the heli went.

Conclusion:

Beautifully done. Highly recommended. Just be sure to leave the supply room and head for the helipad before you kill the second tank in the finale.

Pros:

No more Rochelle voice
Zoey voice
Where I expected issues, like the "blood farmers" conversation on the boat in Swamp Fever part 1, there were no issues. Ellis said his first line and that was it, which works.
Sounds the same for everyone, not just for me, on a hosted server.

Cons:

She called out "Francis!" when Coach got jumped by a Hunter.

Conclusion:

The only thing that could make Rikku more adorable.

Pros:

Master Chief!
Look! A Mark Five!
Good to have you with us, Sir!
Looks fitter and more ready for this than Coach.
For once, a lack of facial animations is perfect.

Cons:

The CI don't run away like terrified Covie grunts.
I kid. There are no cons.

Conclusion:

Definitely keeping this one selected.