They are really changing things up this year:
The first twist is a series’ first: instead of two Houseguests being nominated each week for eviction, as in past seasons, contestants will nominate three in this summer’s edition. This process will be further explained during the season premiere.
The second twist will allow BIG BROTHER viewers to play a crucial role in the game by casting votes for the Houseguest they feel is playing the best game. The Houseguest who receives the most votes will be anointed that week’s, “Big Brother MVP.” The full scope of the MVP’s secret power will be revealed during the season premiere.
I think that they'll only be able to nominate three for only the first half of the show, by then you won't have enough houseguests to make it worthwhile. It should be an interesting twist though, especially with alliances. I also like that the MVP will really make them all paranoid, what if the least suspecting houseguest who is making deals behind everyone's backs gets it! What do you think about it?