A Blue post on the US boards confirmed the pet change is on purpose - they are meant to scale with CHD now so it won't be hot fixed.
http://us.battle.net/d3/en/forum/topic/12473177427#10
As also stated in the Blue post, its actually also listed in the patch notes now aswell.
http://us.battle.net/d3/en/blog/13532431/patch-204-now-live-4-8-2014
Wow, that is amazing. I can't believe Blizzard is buffing rather than nerfing!
Time to work on a WD!