My thoughts for 2021:
Partner with Netflix (or just use 7plus) for 24 hour streams (easy way for Ch7 to offload some costs)
Go back to the live format with:
Sunday Night Evictions (Live). Public vote to save one housemate from Monday prior (see below), then the house vote to evict (think Ch9 nominations room).
Monday Night Games (Live). Winner gets to nominate three housemates
Tuesday, Wednesday daily shows on the main channel. More traditional big brother fly on the wall.
Thursday, Friday daily shows on 7/7mate depending on AFL.
I like some of the scheming elements introduced, but it still needs to feel like big brother. The eviction nomination challenges should be more varied (less physical). There's still room for some more traditional big brother elements as well.