PULLMAN — Somewhere along the line, sometime around when Washington State’s defense began to make these scintillating showings look normal, a certain feeling hung over the entire operation. Isn’t this all a bit routine? The Cougars’ defense held San Diego State to 13 points. Limited Colorado State to just three. Gave up just 20 to Virginia, seven to Toledo, 10 to Oregon State and now only three to Louisiana Tech, kickstarting a compelling trend: In their last four games, WSU defenders are yielding an average of 10 points per game. It’s a long season, so maybe it’s easy to get used to these Cougars stifling...