I think you are confusing issues. The small screens is an explanation for why the commentators struggle speaking confidently about some decisions that we sit at home and can see as a clear decision.With all the millions in the PL surely they can afford bigger screens then. That is no excuse for these crap decisions.
As well as the point about handball rules being different for goal scorers and everyone else, haven't we all said the ali mac decision was wrong? If a decision is wrong you can't really use it to question explanations for correct decisions.Wasn't Ali Mac's arm tucked in close against Spurs when the Mitoma goal was chalked off for handball?