CenturyLink Field got a major facelift that you probably didn’t notice, the Seahawks upgraded the video boards and control room to provide the best fan experience possible. The Sounders should get some benefit of that.
MLS
Soccer clubs prefer soft turf due to its predictability and that it slows the ball down more akin to traditional grass but NFL sides like hard turf that is easier to run and get speed on. After losing their home opener, the turf that the New England Patriots put in back in May was ruled too soft and will be replaced immediately.