I had the same questions about the wipers and the mirror.
If you just took the wipers off, you might have the same effect, and if you keep them handy, it's just slipping the wiper back on and tightening the nut.
On the mirror, I'm wondering about all the excess material under the mirror? I would think that you'd want a boattail behind the mirror without all that stuff below it:
More like this.
Instead of this.
In either case you know that you won't be able to open the door, and you want to be careful about how much visibility you lose out that window.