Pachall will be gone after this year assuming he is allowed back. No guarantees that Boykin will play in the future as Matthews redshirted last year and was the #6 rated QB by Rivals. So when Allen redshirts, he still should have at least one year as the starter unless he gets jumped by a 2014 QB. The other factor you are leaving out are potential injuries which can allow him to play earlier. For example, TCU used 3 different QBs this year. Not to mention, if he develops quickly, TCU is not afraid of using multiple QBs or making him the starter. At the end of the day, players shouldn't be afraid of competition.