After watching a couple pulls from echo, I think if they lose here, their biggest mistake will be not utilizing more of their time yesterday to pull denathrius. I know he was essentially unkillable week 1 since the dps check is already so tight with week 2 gear but they could have gotten a lot more practice in. They look very unpracticed in their stage 2 strategy.
Early pulls on the boss though, maybe they just need to warm up and will show more consistency soon.