Brad Doty,
I agree with you, other than one lazy play that ended up in our net, Richards had a solid 4th liners game. But this goes beyond one game, if the only way MR is going to look comfortable is in a 4th line role then he is gone. Like LITN said, Richards had the type of game you would expect from Clifford when he plays well. At almost $6 million a year you simply need more, and Mike Richards can't provide that anymore.
He will go to a new team and probably be a pretty good 3rd or 4th line center (like he was when DS played him there), he will be matching up with other 3rd and 4th line centers and very well could be a somewhat valuable player to his new team in a limited role, but he will be doing it at likely 40-50% of what he is being paid by the Kings, and at a much shorter contract length.
If Mike Richards made 3 million a year through 2016, no one would want him gone this badly, but that's not the case, pretty much everyone outside of the people who are Mike Richards fans first and Kings fans second sees that.