I really want to play around with this, but I can see a world where this corruption affix really only starts to get used to parse farm bosses, like we're already seeing in Mythic EP.
Sadly the "better" corruption to stack will likely be that juicy Mastery proc, as it's so overstatted our KC will hit like a truck with high crit and animal companion, without sacrificing the current Thrill of the Hunt playstyle. iirc a 3x stacked Mastery affix will give 2955 mastery for 10 seconds at less than 45 corruption? That's 1.5 Primal Instincts!
*Brain explodes with napkin math*