So I too picked today, and a couple of notes:
My seats in section 104 did not change, at all. We went from having 6 seats in our row, to 5. Instead of crawling over two people to get to the aisle, there is now only 1.
In the moments leading up to my time, I never could see what was available. In fact, when the "buzzer went off", the window to pick went away. I had to log back out, then log back in, and nothing was there. I logged in again, and there was a window to start the selection process.
Not the worst experience, and I basically have the exact same seats, however there were moments of shear panic of where I needed to go and what to do when that box disappeared.