Casting is the main thing that should change tbh. The casting for civilian bbuk was horrific under C5, and along with multiple other production choices it completely buried what could’ve been an extremely popular and relevant show (look at all the big brother clips blowing up on tiktok for example, there’s clearly an audience for it but a lot of c5 production choices really drove a lot of people away)
BB18 was probably the worst example of this. I like that series a lot but in a supposed civilian series there were 4 people from ex on the beach, two from Ibiza weekend and one that had their own reality show