FA always involves overpaying; the issue is how much over

Just like KC vastly overpaid for Watkins, and the results speak for themselves, so the Rams have to be just as wise with Fowler.
Yes, he played well. But, a couple of sacks in 6 games does not make him an elite player. If some team wants to pay him like a future HOFer, so be it. That's the way it goes. You never do well overpaying FAs.