What I Liked: Consistent animation, bright simple visuals, good (but plain) character designs, great voice acting (especially from Hisako Kanemoto, the VA for Ika Musume / Squid Girl, and Rie Tanaka, the VA for Chizuru), unique characters (in terms of personalities, anyway). The transition from silly to serious in the last episode was less jarring than in the first season.
What I Didn't: Slight quality drop in animation, but not something that annoyed me too much. Opening theme was grating and less likeable than the first season's cutesy OP.
Final Verdict: While it brings nothing new to the table nor improves on its previous season, Squid Girl Season 2 still entertains and teases out a few laughs. A good companion to the first season.