@Dantrig I think it depends on how many volumes are left. If it's just 2 volumes and they settle the story properly, than the MC being strong is alright.
If he's going to be fighting like that for 10 volumes, ehhh...
Just a heads up, Rokudou isn't going to be fighting like this all the time, for those that worry that this kung fu stuff ruins his character. Him fighting here is just a side thing for him to be occupied with while Ranna and Raino take on the real big bad of the arc.