"God's in charge" - sure, so's a prison warden.
"God's got a plan" - mmm, so did Stalin.
Whatever pastoral comfort those sayings have (and occasionally they have some), the comfort does not come from the "in charge-ness" or the "plan". Sovereignty, in some absolute sense, is meaningless.
Everyone - theist or atheist - reckons some power is sovereign. Even if chaos reigns, something's on the throne, so to speak. The key question is Who?