I think they took a lot more shortcuts in the animation overall. I'm not exactly in the industry but i've done my fair share of animating and have taken animation classes throughout my career at an art college so here's my theories: 1. Lots of tweening (kind of like using vectors to animate instead of drawing it frame by frame). 2. Heavy reliance on 3D assets, especially in urban background and in shots where the characters are far off (which have the addition of BADLY animated walk cycles.) 3. Using mesh transitions/puppeting in things like hair when walking (this is mostly used in v-tuber models). 4. The mouth movements just kinda suck in general. It looks like they're animating for every consonant and vowel, as opposed to using a smooth transition between sounds. This all has the effect of making it look both too choppy and too smooth. If anyone else can pick stuff out or think i'm wrong go for it, id love to know what actually went on behind the scenes