Yeah the live feed is where the real show is at. You get to watch them actually interacting and you hear BB call them to the DR etc and "Please put on your microphone" etc that we are use to on our series.
I'm not really into the current series that much but the previous series have been really really good. And I love the game play aspect and definitely think it could be adapted into our series in a unique way, we all know our current format is really stale. We should still keep public votes though.
The only thing I disagree with though is that you said with the housemates evicting each other means the big characters could go early...but that really isn't true. The bigger characters tend to go earlier in our series because of the public vote.
In every previous US series I can't remember any of the major characters leaving in the first few weeks. The main characters tend to be the best game players so they stay in for a long while. Like Dick last year was a big character and he won it.
Dr Will, Janelle, Allison etc all the big characters in their seasons, stayed to the last weeks, Dr Will winning his season and Allison coming second in her season, Janelle coming third in her season.
Plus the only reason BBUSA changed its rules to the game play format and lost the public vote (BBUSA Season 1 had the same format as ours) was because the US public wasn't use to voting reality shows at that time and Survivor had just started and become a huge success. So Season 2 of BBUSA took a more gameplay style like Survivor.
But nowadays I think if BB was just starting, it would've been more successful in America, seeing as voting reality shows like American Idol get around 30 million viewers!