(!) Spoiler Alert (!) -- [Any Details Provided are Subject to Change] (Part 1)

I understand the 15% devour trait is an issue where multi-skull matches are concerned and sand shark does not have that trait but he does have a 25% chance to devour with his spell. However those that target certain troops have a 40% chance with their spells are not seen as op. What makes devour cross the line when it is only mentioned with maw but not sand shark ot the hard counters?