It terms of movies I never asked for, at least this film has plenty to work with. The original series/films establish that we're at Hunger Games 74+ and there was a huge war.
I'm not sure if Snow is the best main character, but having watched the film I think he was a good enough choice.
A prequel is always going to be a difficult movie, but I thought this did a fine job. If they want to make a few more I'll probably watch them, but if they don't I'll be ok.
I was surprised, but instead of a lazy cash grab this was a very good movie. It respects the universe it's in and doesn't break cannon, the characters are interesting and engaging, the plot was easy to follow and I didn't immediately notice any problems with it that took me out of the movie. I rolled my eyes at the katniss "callback," but otherwise had a good time with it. 8/10.