I thnk when they were first introduced ,they had impact in that they cut out all the tugging holding grappling in the area ,you only had to see the stoke /Everton highlights to see the lack of control by the ref ,and the pundits excusing it on the premise that there would be 20 pens in a match ,in reality stoke got away with murder.Back on point i want to see total integration of any technology that prevents injustice ,cheating, feigning injury,refs talking behind their hand,i just don't get the desire to cling to archaic neanderthal outdated practices by an archaic outdated self proclaimed king from gnomeland .