First, in this release, we made huge strides with regards to Data Science. This includes:
Apache Spark 2.2 is GA. This enhances the stability of Spark for structured streaming.
Apache Zeppelin 0.7.3 is GA. This provides support for notebooks stored in HDFS, and improves the scalability and multi-user support.
Apache Livy 0.4.0 is GA. This version supports multiple programming languages in the same Spark context.
This is a point release, so most of it is around adding updated versions of different products.