Can someone tell me what the Texans are thinking?

[Big Texas]

Mario, Briesel, Winston, Vickers....ALL GONE.
Is there some grand plan going on behind the scenes.
In one offseason Arian has lost 50% of his blockers.
Please tell me theres some GRAND plan to get WR, LB depth, and entire right side of the Oline.

OR

Is this one of those arrogant Texans decisions?