I'll be little less chilled if this update went within "big combat rewamp" in game. But looks like this thing is a nice step from developer to push us,fellow warlocks, in sun shining of this wounderfull summer 
Who cares if 9/10 never comes back?
up to FM and BG.
"Are you asking how I can compare Bony Grasp to Frozen Manacles? Easy. They are both perfectly good root spells and they are both still used at 50, regardless of when we acquire them. They both have advantages and disadvantages depending on the situation"
What i can say to explain you such evident things? No one meant to use lvl 19 spell at 50 lvl because they have no better spell/alternative! If you prefear to use an old , outgrayed ability/spell than it is somthing wrong with you not with whole warlockclass.