I have not pulled the entire liner down (yet), but I can vouch for the roof rack, it's attached with torx screws into riv-nuts and well, of the 27 or so torx holding it down, I got 25 out before a rivnet decided to spin. It was a real pain and I ended up popping the riv-nut out of the roof.
Do not take the rack off unless you really need to.
The A-pillar will come right odd. Remove the handle and pull.
The back plastic also comes out pretty easy, but you have to take most of the back apart to get the sides off. The side panels are held in with clips, and once you take all the trim off, they just pull out.