Sure, they were stupid to try and make the second house a secret
I was thinking they could stick everyone into the main house, make sure three or more people are nominated each week, move the nominated housemates into the second house, have a competition where the winners are saved from nomination and get to move back to the main house, then the last two stay in the other house until one is evicted. The one who survives eviction is sent back to the main house, and the rest of the housemates don't know who is evicted until that housemate returns.
If that makes sense lol
But then if you get the same person in the bottom 2 each week it might get boring so ur idea is probably better