Absolutely not. When you chose a particular set of 16 players for three tests, no player should be sent home unless something drastic like injury etc. happens. Just see the situation: A player is selected in test team; he has not played a single test and his performance has thus remained untested; but he is told that your form is bad, go back. If any player is to be sent back on the basis of form, he should be amongst those who had played and miserably failed in both the innnings, not Irfan.