Was lucky enough to hear quite a few tracks about a month or 2 ago now from the record and LOVED what I was hearing, but from speaking directly with Drake and his team, it was quite clear that he was obsessing over every litte last detail. At the time, it was definitely paying off for him, but sometimes if you keep tinkering around and tinkering around and tinkering around, it can become a negative.
On the other hand, who is to say that the reason for the push-back is that he is still working on tracks to that extend. Could just be a move by the label. Either way, so stoked to hear this when it finally comes out.