You'll be being short-sighted if all you want out of a group dynamic today is complete agreement. A dissenting voice or two might slow down the process, but these people will also bring up good points and offer some exciting ideas. So let the multiple voices in your group say what they want to say: and make sure you put in your two cents as well! If you encourage individuality and expression in any group dynamic today, you will be a part of something beautiful and memorable.