If by successful season you are talking simply being bowl eligible, we will have a great shot at that with solid QB play. A healthy Dungey or if DeVito can step in at that same level would do the trick. The D will probably be erratic, so a big part of any success we hope to have will be outscoring the other guys.
If by success you are talking about competing for an ACC title, that will not be in the cards anytime soon. We just can't recruit at a high enough level. To turnaround recruiting we will have several plus .500 bowl eligible seasons in a row and also we will need to make the Dome a place where kids want to play, whatever that may take.