I've only heard Leave in a couple mixes, mostly the Lenzman studio mix that came out a few months ago. The whole ep is very good IMO. Marcus does sit on tracks too long though. I felt the same way about the Skeptical EP. He's old school. That's the way it used to be. By the time you actually got your hands on a tune, every established dj had been playing it for 9-12 months.
What Used To Be is a real timeless bit IMO. It could have come out at any time. You could hear it 1000 times and it would still move you.