Overall, more of the same. It's clear the creative team thought they would go on for another season, as there's no hint that the Turtles are going home anytime soon. The "Day of Awakening" finale was crammed into 1 episode, and it got the job done though it felt very rushed. The Zixx episode was a bit ho-hum compared to 'Milk Run,' and the return of the Dark turtles saw some character development in a very cliche and played-out package.
By far I was most disappointed with Head of State, the Bishop episode. You get a lot of good back story in this one, but the emotions get very sappy, melodramatic and ham-fisted. The lack of subtlety kills a great story.
I personally think we've seen the best of this season with episodes like Milk Run and Timing is Everything. The last six don't top those.