I watched 2 seasons.
First off, you should do better getting and make sure couples actually own, decorated, and manage their own places. It's not a level playing field.
I think it stinks that people are allowed to vote so unfairly. The nastiest people almost won in both seasons by being jerks.
I think a great twist would be that each couple has to rank the other 4 couples 1-4 (no repeat numbers) for how they are as housemates.