This is very confusing and unless someone has the actual facts please don't speculate, that's how shit gets started.

Ariel wasn't the Head Coach as far as I knew, it was his brother Jaime. I thought Ariel was an assistant for the boys?

There is no way any ML coach would be fired for 1 down year considering their overall success with the current coaches.

I am just curious if Jaime, Ariel, Nielsen, Tanguma are all leaving or....?

I wish them all the best and ML will be fine. The last couple years killed many programs TBH.