re: Will the Spread offense eventually die out?

Doubtful that it will completely die out. Most of the rules are geared toward promoting the passing game and protecting the QB. Everyone seems to want higher scoring.

If QBs took shots now like they took in the 70s and 80s there would be no passing 40+ times a game. Very few could make it through a season taking old style hits. Coaches wouldn't risk having the offense rely completely on QBs, etc... etc...

Both NCAA and NFL rules are dictating that the pro-style, and to some degree The Spread, are here to stay.