The concept is so simple that they overthink and overproduce it.
Throw 14 people in a house, put live feed on 24 hours a day, and let's all sit back and see what happens. With 24 hours to play with, there will easily be enough footage to show the following night without doing anything - you only need 43 minutes worth. There's absolutely no need for any manipulation. Stop messing with the format, as long as they have a good casting team, the series will be a success.
It doesn't need people shouting and screaming at each other as soon as they walk in until they walk out for it to be "entertaining". Simple things, such as actually seeing a normal, every day conversation happening, seeing people bonding and forming friendships and alliances, seeing people have - shocker - a laugh together will add so much to the series.
The tween audience aren't loyal or reliable. They don't stick around; they're onto the next thing before long... ratings are declining... contrived arguments and negativity isn't something people want to see. They should be trying to appeal to the hardcore fans, but who are they anymore? Are they current viewers those who love the concept of 'back to basics' who are clinging onto hope the golden era will return one day, are they people who love the format as it is or are they people who simply love 'Big Brother' regardless of what they do?
I actually think the back to basics format would work simply because we haven't had it for such a long time; people will see it as refreshing. Look at all the current shows; they're all so overproduced and I think people are sick of them. Yet something like Bake Off is scaled back and is one of the most watched TV programmes of the year.
People can see right through these shows now; people just want these shows to stop trying to manipulate them and to be honest with them. It's time they stop insulting our intelligence and start respecting us. That alone would be a start.