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