Kinda shitty they threw Mitsurugi under the bus at the end there, it's actually pretty solid and technical, it's basically DMC's bloody palace mode, DMC also looks like shit if you just literally press the same button over and over.
Here's a video that gives a better idea of what it's actually like: https://www.youtube.com/watch?v=STDM-FNL-Fk
Here's a video that gives a better idea of what it's actually like: https://www.youtube.com/watch?v=STDM-FNL-Fk