While the update made the game more fun, it also made the game incredibly easy.
There's no need to switch weapons, no need to even move since you're likely to just regain all your health, you can always just parry their attacks with your own and can always trigger them and just...snipe them from away while they slug towards you.
Not even score can be a reason, since parrying and kills also net you score, it's very easy to get S ranks.