The P1 struck me as a distinctly entry-level product. One thing I've liked about Crucial, over the years, is the decent value of their mid-range offerings. I'm still waiting for a mid-range NVMe drive from them - something akin to their MX-series SATA drives.
Also, I'm hoping we'll see a 3D XPoint product from them, since Crucial is owned by Micron, which partnered with Intel on the tech. So far, they've only announced (but I'm unsure if it ever shipped) a Micron server product based on 3D XPoint.