Kaitlyn's rivalry with Vickie has brought out her personality that the fans have connected to and she can use that to go on to be a successful face and shes a half decent wrestler for someone brought in at last minute.
AJ has natural charisma and good in ring psychology from perfectly timed facial expressions to good wrestling.
Maxine is also good in the ring and is able to carry storylines such as with Hornswoggle. What she lacks in personalityt she makes up for with a cold approach.