Probably more personally-charged inclination than logistical. Variety can maintain an individual's in the block if the long-running stuff isn't their cup of tea. That said I think having 2ish slots for more normal lengths shows is still a good mix, HxH is supposedly one of the better choices regardless of length, and (to me) it seemed the number of good/recent shorter shows to choose from has started to dwindle a bit anyway.
I might be totally wrong on that last point, I know nothing about anime, remember.