There is no doubt that "More Than Words" was a big part of making that record sell. I will say though that the production of Porno is in a different league than their records before and after Michael. I was living in LA in those days and remember when Pat Badger played me the board mixes in my car. I was floored. Everyone in my circle was completely blown away by the tones and attitude. Most of us forgot that More Than Words was even on the CD. We all knew that Extreme was a tight band but the sound of that record is what many of us were talking about. There wasn't the same buzz about 3 sides. Flat sounding and uninspired. I do know some of the inside scoop about the band leading up to that record. Success and constant touring can take it's toll.
BTW, Michaels's work on the first Saigon Kick record though different has that same edge and power.
Can you truly define all that a great producer does, or only the obvious.