lessons you hope coaches have learnt during world cup

continuing from last years premiership and champions league,i hope the number i lesson is that coaches stop playing left wingers on right wing and vice versa.gerrard,robben,villa,messi,maxi rodrigues etc,all examples of teams  doing this . problems it causes include,

stops strikers gambling and making runs into the box,in the hope of early crosses.

narrows the pitch,congesting midfield

catches strikers offside

advantages same to be the odd goal with strikes on their prefered foot after cutting inside