Allen was a great player, our #1 corner until his injuries and prior to Vontae. It has been a long time since we have seen him on the field, but he should be fully recovered so I think we can expect him to challenge for the #2 corner spot. Sean Smith is a nice player, but his height works against him against the smaller quicker players. Against taller receivers, he does the job.
I think Allen will reclaim his measure of respect. It just adds another stud to an already stout defense.