The JPK actually uses a fabricated fin keel that is a strut with hollow fairing at the top and lead at the bottom giving you the benefit of a lower cog but with the hydrodynamic benefits of the straight fin. Currently this incurs a penalty under IRC but from what I hear that penalty may be scrapped for 2020.Surely the point of the hull form of boats like the Sunfast, the JPKs, the Ofcet etc is that a good proportion of their righting moment comes from the hull form. As such, unless you go for a massive long canting keel, the benefits of having a bulb keel are reduced compared to a narrower boat without a chine.
Certainly even the shorthanded offshore guys are mostly using the IRC keel on the JPKs. Giving up a bit of CoG for less wetted surface area, an easier boat to drive (and hence easier on the autohelm) and potentially actually faster downwind. I'm not actually sure if the JPK1080 is even available with the bulb keel that the 1010 was initially.