How much time are you imagining the crew have got between flights to tidy up the plane for the next flight?
So for example: while booking you get to select those options, and while they load the luggage, an app on some crew tablet quickly arrange the seats and hit submit, the rails automatically do the jobs! Ycombinator, prepare that VC funds!! ;)
There's no way, in my experience, that they'd have time for something like that. Especially since anything that moves will invariably have mechanical issues from time to time. I've had to sit in a broken seat before because they simply do not have time to fix it between flights.