As the author of the project, I'm a little bit biased.
The reason I made jeromq was I also had some trouble with deploying jzmq having JNI.
The project has a short history but keep improving from feedbacks and contributions.
But it's not a replacement of jzmq. Both project are active and driven by a major community. You can get help from the community and contribute to the projects also.
From the 3.0-SNAPSHOT, it has a API level compatibility. You can switch between jeromq and jzmq easily without changing your code.