I'm completely aware that it isn't Madden. I played both as a TE and as a DE four years in high school on the varsity, a far, far cry from D-1 or the NFL, but I'm aware that it isn't Madden, thanks.
I'm also aware of Richards role, and the duties he had in his role. Trying to go with a three or four safety look to try to simultaneously limit the run while also not giving up much in pass protection wasn't a bad gameplan, but Richards was a massive weak link in that gameplan. His tackling ability and his speed were the major limits to his inefficiencies. The Pats needed to either add a bigger thumper of a LB and a CB to replace two safeties, or they needed to have someone in there to better take care of the 3rd or 4th safety role, and I do believe that Butler could have done that role better.
Not an ideal by any means, I understand, and if they had a better option than Butler on the roster, it would have been much, much better, but I'm saying that Butler, COMPARED TO RICHARDS, could have done that better.