It would be cool if they put single men and single women in the same house, let their relationship bloom naturally VS bringing couples.
When you have singles, their will be lots of drama, you'll be guessing if person 1 will fuck person 2, or if person 2 is going to end up with person 3 and person 3 ends up with person 4 etc.
It will lead to lots of sex, drama, fighting and good laughs.