[Jack_]

I don't think there's any reason why a switch to the US format would mean you have to reduce the number of episodes too. Three episodes a week works in the US and Canada because they act as roundups of what's been happening on the integral part of the show - the live feeds, with each episode themed around one of the competitions/eviction.

In fact, keeping a daily show with a change of format would allow you to flesh the characters out more and mean that the entire show doesn't have to revolve around strategy, you could still show regular conversations just as much.