I wouldn't want a free kick awarded every time a ball strikes a hand or arm. Refs need to use their discretion, same with fouls. Many now come from forwards deliberately making contact with defenders and being awarded free kicks. Pundits don't help, they look at a replay and once they see contact they claim a foul is the right decision. TV is to blame for all this.
Gayle wasn't deliberately tripped. Roofe's handball was deliberate, Rodders v Villa wasn't.