They should do a shorter (maybe 4-week) celebrity season in the winter or spring, where the evictions happen more often than once a week, and there are more live shows. This works well for BB UK.
That way the summer season can still be a normal game with newbies. That should always be sacred, with a minimum of wacky themes/cast rigging. People are being asked to invest 3 months of their lives into it, so they shouldn't tamper with it too much.