No plugs next to bed. First thing I do in any hotel is unplug the alarm clock and plug in my power strip.
Second would be checkin inefficiencies. I would love to see hotels install some kiosks. Or at least have two stations - one called "I have my stuff together" and one called "everyone else."
Third would not be not having the reserved bed size. I get that it doesn't match up one for one all the time, but when you stay at the same hotel every week and it is frequently a problem, there is something wrong with the allocation system.