Brian
If the seats were turned round so you could look out of the window, knee room would be rather limited and it would be very difficult to get into the seats! Seriously though, the layout is intended to permit as much standing room as possible for peak periods. The concept is that most journeys are of less than 20 minutes so it is acceptable to have to stand at peak times.

I guess people would rather stand on the trains than stand on the platforms waiting for a train just so a few more people can sit.