Aarons is probably slightly better than Tanganga and Foyth at RB as both were CBs. Shame we didn't get to see more of Foyth in the role, as he showed promise (who was it who said all fullbacks are failed midfielders and CBs?)
Aarons didn't really catch the eye this last season. KWP probably looked better. I guess the questions are around Aarons raw attributes - does he have pace, intelligence, a strong work ethic, promise. If these ingredients are there, then sign him up. At 20 he has plenty of time to develop. What do your Norwich mates think of him, do they rate him highly?