Hi,
we just found this blocker issue in OS3 tooling
https://issues.jboss.org/browse/JBIDE-20902:
Using the latest middleware templates, that contain required parameter,
selecting any template in the application wizard will load required
validation constraints that are never reset, making creating a new app on
the 1st try highly improbable.
We didn't find this earlier because the new version of these templates are
not available yet in the different OS3 staging environments.
I vote for another respin.
Fred