As we didn't receive seat assignments with our LH TATL confirmations/e-tickets, is it safe to assume that on LH405 we economy flyers have been seated in a special area of the back cabin too, and that we might benefit from blocking of the centre seats if our group doesn't fill that whole section? Is there a link by which we can actually see a "live" seating chart for that particular flight (as one can when booking on the UA, US and AC sites)?