Well, we’ve got 5 episodes, that’s more than enough time. How much of that is going to spent on Asami though is a different matter. If she’s a permanent member of team Avatar now then there is great potential for some intricate character development.
But I honestly have no idea where the series is going, we could get a whole ep in the spirit world, and the finale is going to be Amon getting beat. So Asami potentially could be out of the picture for great chunks of time. I hope that doesn’t happen though. Unless it’s Aang that comes into the picture, in which case, sorry Asami.