Bo comes out of the Dawning claiming to be stronger, and yet is a generally weaker character overall.  She spent most of the season allowing other characters to act for her, most notably Dyson in the Dawning, and Tamsin and Aife in the finale.  It was so bad in 3.13 I felt like Tamsin was the main character of the…

A lot of people do seem to have missed it—her contributions to the events of the finale were significant but not telegraphed with big (laughably bad) fight scenes or excessive emoting.  She just quietly did her thing, then disappeared.  I think we're supposed to be left very up in the air where Lauren is concerned.…

Agreed.  Lauren got some major development this season, and story possibilities that are literally wide open.  She is a fugitive in both the human and fae world, yet she possesses powerful and dangerous knowledge that could be the ultimate bargaining chip for her.  The fae are arrogant enough to underestimate her.

I think this has been the show's best season, though there have been some mis-steps.  The middle of the season dragged horribly with surreal episodes that felt self-indulgant and pointless, and the ending felt rushed.