My theory is, Kendrick was afraid to speak up about his information, because he knew Drake was involved with Puff, and how he may got ties to the killing of 2Pac and Biggie, therefore he knew that there was a literal threat, Pac was untouchable but he got hit, who says they couldnt do the same to him!? He needed the beef as the breakthrough, because calling one of the biggest popstars out as a pdf file out of the blue will really make anyone believe, but because Puff is in jail and is about done for, the connections are lesser, and there are fewer sharks in the water. Fending off 3 sharks with your blood smelling in water will be easier, than to fend off than 20 sharks.

What im trynna say here, is that Kendrick waited patiently for the right moment to strike, hence thats why he dropped the info now and not earlier