1) Get a bore snake, it will solve ALL your cleaning woes. Well, not all, but at least those associated with cleaning your bore
2) The rifle was designed to be issued to police ops, not ops in the field/jungle/desert/etc.
3) Yeah, it kinda sucks. I'm really hoping someone steps up and makes some aftermarket ones that are both cheaper and able to be cleaned.
4) Yeah, it's pretty involved. Involved enough that I only did it once every three range trips.
I'm pretty sure you can get replacement stocks, I think I talked to Tanner's a while back about getting one to put on an SLP and they said they could get them.