If you don't like a particular room you've been assigned after you arrive, do as you would with any hotel and politely ask for another. Y Additional amenities differ from resort to resort and are detailed in the book as appropriate. Even if your room is not available, you can register, leave your luggage, and go play at the parks while your room is being prepared. If the resort isn't busy, they may grant your request at no extra cost. You can also leave your bags with Bell Services and go play in the parks.
Programs are typically available in the afternoons and evenings and have an hourly fee.
In-room sitting is available through KinderCare. See page 180 of PassPorter Walt Disney World for details. Concierge services are associated with certain rooms within a resort and invariably come at a higher rate. Business Centers offering complete office environments are available at each of the above resorts. Some resorts even have a phone in the lobby you can use to connect when you can't use your own phone.