Note: This was written before seeing the finale, because no matter how good it may be, the rest of the season has to be able to stand on its own.
So, Nick’s TMNT…it’s improved. It looks prettier. The turtles’ neighborhood is larger and no longer looks like a barren wasteland devoid of people. There’s a bit more variety to the plots and premises and settings, at least superficially. In short, the show has improved in the way most shows tend to improve in their second seasons, as the creators get more experience and assets under their belt.
None of that helps the show be any less terrible.