The original movie barely has any action. Turtles isn't about action, though it often has action. Turtles is a mix of comedy, fun characters, the story of family, and butt kicking mutants. Distilling ninja turtles, a franchise that has tackled a whole range of cool, interesting stories into lol action seems like a disservice. Might as well make a spider-man movie that's only Spider-man fighting people. After all, it's not Schindlers list so story and characterization don't matter!
I fucking hate it any time a comic book movie or whatever comes out, and it's a bloody fight fest without staying true to the spirit of the original - and not in a nerdy NEEDS TO BE 100% ADAPTATION way either - some fucking moron says,"what were you expecting, Schlinder's List?" As if story and characterization are NOT inherently important aspects of comic books or comic book movies.