Best plays to take away the middle of the Field
 

Is there a zone blitz that can take away the corner routes and cover the middle of the field? I'm not getting pressure with 4 rushers and even my zone blitz does not create pressure. Cover 2 man gets shredded by slot receivers running crossing routes, drags, and slants. I feel like 70-75% of users throw over the middle cause it's so open and shading inside does not work very well.