Well Korra and Bolin growing closer again is a good opportunity to 'make up' for her past mistake, even the past Avatar's are trying to prevent her from going to such a deep dark corner in her heart where taking her life was actually considered. In short, BolinxKorra is on. A week later is fine, just after Asami is introduced to the possibilities Xana and Xano can create and awaken the latent potential within. As Pema's condition worsens there will steadily be less of Tenzin, naturally, as he'd want to be with Pema and try to understand how things could go so wrong when she was so healthy days ago. Asami adjusting to bending is fine, but who is she trying to befriend? And yes Mako would be interested in it as well, withholding surprise that Bolin had taken a little charge and wanted to sign up.