Man...I can't be the only one who thinks the quality of RWBY fight animations has gone way downhill, right? To me, the battle starring Sun and Blake was full of wonkiness, compared to fights earlier in the series.
It's not just that the fights aren't brilliantly done anymore but they don't have a purpose anymore either. In the old volumes each episode was usually punctuated by one big fight as a climax but the fights furthered the story. RWBY going up against the White Fang, the Vytal Festival singles matches, the initiation battles, all that. They served to tell part of the narrative. Now it's just like we get three minutes of volume arc story and twelve of a fight that means absolutely nothing. Ruby and what's left of Juniper fighting the Golem, Blake and Sun fighting the sea serpent. Those fights could be completely removed from the episode without loosing any story whatsoever.