Concur with what's been said already, especially the lying down, or in case of emergency, get their attention and FALL to the ground. They don't like that, and want to know what's up with you. Also, if they go off on their own, they usually return to the place where they last saw you (at least mine do), OR they will pick up my scent on the route that we went and walk back to the car or house (happened multiple times). Still stressful, though.
We feed raw meat (deep frozen) and like that a lot (our 2 sisters do, too!). Some vegetables too, like broccoli, cabbage, red beet, carrot, and the like. Both cooked and raw. We only bath them when they have rolled in something stinking, like a dead bird or so. When wet or muddy, we give them a rub with an old towel - they do the rest.
You can work on it - opening the front door and closing it, without leaving. Then leaving for a minute, then a little more, and so on. What also helps a lot, strange as it may sound, is telling that you are going and when you will be back (make sure you are back at the right time!). Never a problem, for up to 3-4 hours. We don't crate our two sisters - they sleep all day anyway. Good luck!
Maybe not crate her anymore at night. Maybe she is afraid. We never crate our two sisters and they are allowed to sleep where they want, even in the bed under the covers. No issues, no problems, no destroying, no peeing. All our best thoughts to you all.
As for the walking around, our Lela has done that for the last 6,5 years. Her sister sits still while pooping. Personal thing, I guess. As for the watery-ness: we feed raw meat and this gives much better stool (and better coat and other things): thicker, and about 40% less, no more diarrhea which they had weekly when on kibble (even high quality). Maybe you could try it, and add probiotics for a while to build the intestinal flora. Cooked pumpkin and sweet potatoe are also great to end intestinal trouble (no rice and chicken).