They should really try puzzles or riddles sort of tasks, like escape room-esque? where contestants can use their brain a little. Like mind games.
That nomination task was good where they each go in and pick a member, or captaincy where one was given someone's name. However, they should close loopholes e.g. cannot nominate oneself and cannot name the person's name you are holding.
Or just give them a weird, fun task like in Taskmaster UK. To see how housemates think.
But BB likes aggression despite Salman claiming we don't wanna see fights. How to avoid fights when you ask housemates to throw literal mud at each other, or give them demeaning labels -.-