The way they did it was perfectly fine.
16 fights in one week? That would be ridiculous to pile into one hour. They would've only had time to show recaps of every fight. At least the way they did it we got to see 4 fights and 4 recaps. If they were going to devote 3 hours to the premiere they could have packed everything in. With the 3 hour fight night and that other show spike was premiering after TUF they had no way to pile 16 fights into an hour.
I would have liked to see the 4 fights they only showed recaps of. Even the one Dana was bitching about with the wrestler. I bet Rampage and Dana had some entertaining shit to say about how boring that was.
Not one hour, should have had the rest the following night. I don't mind it, but from a ratings standpoint, most people need someone to connect to in order to keep track... or interest in this show... though they can get by as they have two of the most entertaining guys as coaches. I only speak from the business standpoint of things on this, as the ratings keep getting a bit lower each season after the Tito/Ken season.