as for setup, you simply attach the door to it's counterpart before you pitch it, this actually sets the perfect pitch if you will, and everything is exactly where it needs to be. you still need to judge the correct ridge height to keep the edges close enough to the ground for the conditions, but that seemed pretty easy.
as for a steeper pitch, my design couldn't go much steeper, the tarp is already 2 full pieces wide, staking it much steeper would likely result in a tarptent being too narrow (for diagonal sleeping anyway) (keep in mind you don't want your feet protruding into the side of the tarptent, especially if it is wet due to condensation)
i designed it so that in the worst weather, simply use the setup you see in most of the pics and seal the door if necessary. if the weather isn't too bad, you can raise the un-connected side, which would keep you from being able to seal the door, but you likely wouldn't need a tight seal if the weather is calm enough to raise that side anyway. basically, you should only need to seal the door in the worst of conditions, and the tarp has one setup that enables this. in better conditions, or with one of the 3 closed sides facing into the wind, you shouldn't need that tight seal.
i intended it to be used as more of a 3 sided wind barier in all but the worst conditions, and this is where it is the most versatile. keep in mind it can be used as a regular tarp with the panels folded in as well.
hope that answered a few of the questions