The 2nd floor honeymoon rooms have a sitting area, not a sitting room. MrDisney can confirm the setup, but I think that it's a sofa, plus the table and 2 chairs. In a normal standard room, there's enough space for 2 double beds, plus a daybed and the table & chairs. Just change that setup to a king bed, sofa, table & chairs and I think you've got the idea. Space wise though, it's the same square footage of a standard room. The difference between booking a standard concierge room and a honeymoon suite is that you're guaranteed a king bed and unless you request a turret honeymoon style, you're also guaranteed a castle view.
Yes, all turret honeymoon suites are in the main building. 2 rooms are located on the 3rd floor, 2 on the 4th and 2 on the 5th. There are two views offered with this room. The first is a panoramic view from the monoral, across the Poly and the Wedding Chapel to the GF beach and lagoon. The second view is from the Poly across the GF courtyard to the castle.
Tammi