Did you actually get one like that or are you just looking at the room descriptions. I agree, it doesn't seem to make sense to have two smaller beds and if we got a room like that I would complain. I guess I kind of assumed it was just an inaccurate description of the rooms.
We indeed did have a room such as this. 2 full beds.....When we walked in the room we were a little surprised, but then decided that this is the sex bed and the other was the sleeping bed. Cleaning service probably wondered why was that (sex) bed always messed up more than the other bed. Poor person had a restless night....
That doesn't seem right, that there's no price break for putting four in a room.
But in any event, if you are "steady" with another couple, and will all end up in the same room every night anyway, and are used to traveling together....