I have long legs and get cramped enough without putting anything at my feet as well. I put everything up too. When I travel with a case I put my laptop sleeve on top of my case too.
If I am using a backpack (usually for short domestic trips or short haul international status runs), I can take my laptop sleeve out of the backpack if needed to stay within weight limits.
If I am using a backpack (usually for short domestic trips or short haul international status runs), I can take my laptop sleeve out of the backpack if needed to stay within weight limits.