If you feel that you are not ready to submit your MBA application prior to Round 1 MBA deadlines, then simply do not. There is nothing more off-putting to the Adcomm, then MBA applications which are prepared in haste. It is best to aim for Round 1 MBA deadlines and to thoroughly reflect whether your application is as strong as it can be. If there is any doubt in your mind after reflection, then quite simply, wait until Round 2 to submit.