The new Oracle Maven Repository now has an index available which should make it far easier to navigate the contents. As you may already know there's a number of important WebLogic artifacts in the repository. This is a standard Maven index, built with the Maven Core Indexer code and is available at https://maven.oracle.com/.index/nexus-maven-repository-index.properties and https://maven.oracle.com/.index/nexus-maven-repository-index.gz. The easiest way to view the index is through an IDE like NetBeans that has a Maven repository browser:
You should definitely try the index out with the tools that you are using as well as the repository generally. This relatively early stage is a great time to provide feedback so things can be as polished as possible.