It's not grindy - you've played the Personas and SMTIV, it's not that kind of climb. It has some clunkiness in its jumping mechanics and gear battles can get tough what with managing fuel and everything, but it's worth it and things get considerably easier much later when you can finally get access to gear healing. I wouldn't be mad at anyone, though! I just think it's much better to experience this game for yourself rather than watch it. You get a more visceral experience that way