Yes. This is entirely accurate.
Allow me to clarify what I am saying;
- Is Parallax intended to be run with JNSQ? No, not in the slightest.
- Do either author intend for you to use both mods? No.
- Do they run the way the authors intended? No.
- Can you do it anyways? Yes.
- Would it work significantly better with a community patch? Absolutely.
JNSQ is in no way designed to run with Parallax. Any compatibility is simply down to the fact that JNSQ uses default planet names for may bodies. Any new planets added by JNSQ will not be changed by running Parallax. Modified stock planets will have tessellation and ground scatter, however they will not function as intended. For a proper experience your best bet is to wait until a community patch is created.