We have done this "debate" topic in the past but it seems worth revisiting from time-to-time given periodic changes to the program.
Deluxe Studio villas are quite a mixed bag across the 13 DVC properties. Most feature a queen-size bed plus sofabed but some have two queen beds. Several resorts are being retrofitted with a twin-sleeper for a 5th guest. Newer properites like the Polynesian and Grand Floridian have a split bathroom setup.
Topic: Which Disney Vacation Club resort has your favorite Deluxe Studio design / setup?