There's also measurable stats that showed how effective he was when he scored 15 points in 20 games while averaging close to 20 minutes a game during the first Cup run.
Then the following season he had 12 points in 15 games as the team reached the Conference Finals. Richards was pretty productive in the post season up until 2014
Playoff stats:
Richards in 2012 and 2013
35GP, 27pts, .771ppg
Richards in 12/13/14
61GP, 37pts, .607ppg
Those are numbers. Facts.
Here's some facts, and measurable numbers:
In the 09/10 and 10/11 seasons combined, it took Mike Richards on average 30:52 minutes of even strength ice time to produce one point. Over the same period it took Simmonds 29:59.
This is despite the fact that Richards was still getting played on the top lines in 09/10, and despite the fact that Simmonds played on a more defensive oriented team, in a more defensive oriented conference almost exclusively in the bottom six.
See, the biggest problem for the Kings prior to the trade wasn't that they lacked a Mike Richards, it was that they needed a new coach. That's why even after Richards was acquired, the team didn't improve. (Also, the Kings biggest need was offense, and swapping Simmonds for Richards was essentially a lateral move or arguably a downgrade in this area.)
I have nothing against Richards. He did contribute to the Kings. I was one of the people that supported Dean not buying him out.
That said, I don't think he was the catalyst that turned around the Kings. I think he gets too much credit, and I think Dean could have acquired a better player than Richards. People forget that Schenn was the top ranked prospect in the world by most people at the time of the trade. His asset value was extremely high. Trading Schenn was absolutely the right move, it just shouldn't have been for Richards.
The irony of this, is the failure of the Richards trade to improve the team, is probably key to getting Terry fired, which is exactly what the Kings needed.