I definitely enjoyed the blending of a realistic premise and a sophisticated "Sharknado" atmosphere in this movie. Although the array of stand-offs between the main characters and the alligators seemed farfetched and repetitive at times, this movie still delivered a satisfactory level of entertainment. Not the greatest motion picture out there, but still worth seeing.
Usually, it's expected that a sequel won't fully live up to the expectations of its original debut, but this sequel was outstanding. One criticism I have about this sequel and the other John Wick movies is that the hand-to-hand combat scenes can get kind of long-winded and bland, so much so that it gets boring and unbelievable. This, however, is not a very damaging flaw in the series, but definitely a notable one.
It was an excellent movie, but I could've done with more action and variety in the combat sequences. The lack of color in everything (setting, costumes, etc.) was slightly depressing but I wouldn't consider it a fundamental flaw in the movie.
A few things really bothered me about this movie. Firstly, this movie made little no use of the incredible array of actors they had cast, Zhang Ziyi and Charles Dance most notably. The animation and special effects were stunning, but it was such a huge focus that I couldn't get a feel for the characters. Then we've got Vera Farmiga sparking the conflict by going "eco-terrorist", and you expect me to buy that? Remarkable animation, lousy writing and use of actors.