I doubt she ever wanted him to step out of the shower. He left some blood on the wall next to the shower on his way out of the shower. We know that because it's behind his robe hanging on the wall, so it could only have gotten there coming out of the shower.
And dismember him? No. At most she may have considered setting his house on fire (the aerosol sunblock which was removed from the market because it was a fire hazard, being nearly 50% alcohol. She bought two cans of it at Walmart along with the third gas can). That is purely speculation, however. She may have had no such plan.
She put the camera in a very small wash load to remove blood and her DNA. Much too small a load for it to be accidental, imo. I doubt she ever considered taking it, but she needn't have taken the whole camera, just the tiny little SD card. She didn't throw everything in the wash, just a towel, the clothes he took off to get in the shower--sweat pants, t-shirt, black socks, and bleach. Not much else. His bedding was washed earlier and was found in the dryer. She testified she isn't sure who put his bedding in the wash, but said "probably me."
The burning question I have is how the camera traveled 10 or 11 feet from the shower--around the corner almost the entire length of the hallway. Did it really roll that far itself? Maybe, if JA/TA's movement was really spirited or violent.
Btw, Wilsodh brilliantly figured out where she was standing when the next-to-last photo was snapped, which photos support, and building on his work I finally was able to match up the wall patterns visible in the last photo to the spot on the wall just below that big bloody swipe - showing that the camera remained close to the bedroom, and roughly in the walking path, even though it rotated direction about 90 degrees.
No, the bullet entered above his right eye angled toward his left cheek. Here is a closely cropped photo showing only where the bullet entered.