I kind of get what you're saying. They just felt slightly off, like they weren't all 100% synced up with xQc yet. I don't think it was bad, by any means, but because they were playing Seoul, that slight off-sync showed up.
I think they left him in just because he is so aggressive, which is a better match-up vs Seoul than Cocco's play style. They wanted to dive/counter-dive rather than just get dove on with no counter.