Major Notes:

• CXF 3.2.x now requires Java 8.  Support for previous versions of Java has been dropped
• Old management-web module removed
• jibx, sdo, and xmlbeans databindings removed
• "object binding" removed (coloc binding handles most of these use cases)

New Features:

• JAX-RS support updated to latest 2.1 spec
• New java2swagger Maven plugin
• New WS-Transfer implementation
• Enhanced tracing support with Brave
• Support for Spring Boot 2.x
• JAX-WS - support for per-operation schema validation configuration
• New http-undertow transport

Major dependency changes:

• Jetty has been upgraded to 9.4.x.  Support for Jetty 9.1 and earlier has been removed
• Woodstox has been updated to 5.0.x which is in a different group id and has a different artifactId.  It's possible that you may pull in multiple versions of woodstox via other dependencies.
• Swagger 1.x (package com.wordnik) is no longer supported, please update to Swagger 2 (package io.swagger).