I think the people wanting Kendrick to address shyt are either dumb or Drake dikkeaters.... Kendrick addressed shyt in his own way.
First, he predicted exactly what avenue Drake was gonna take after hearing 'Push Ups' so he said Drake is a habitual liar and "don't tell no lies bout me, I won't tell truths bout you" going back to 'The Heart Part 4'
Then he also addressed the mole thing. You think it was Cash? I need you to think.
Then in 'Not Like Us' he says "stop trollin like a bytch, ain't u tired" and at the end "The 'Family Matter' and the truth of the matter is it was 'God's Plan' to show you who the liar"
Just because Kendrick is creative and witty enough to address shyt within a song structure doesn't mean he didn't do it. You know what happens when you spend too much time on allegations? "The Heart Part 6" happens... a terrible rebuttal that everyone dismissed as soon as it dropped.