Version 2.13.0 of the rollbar-gem introduces several notable features and improvements, including the ability to override configurations for specific code blocks using the new Rollbar.with_config method. This update also enhances error reporting by including more detailed backtrace information with options to control the extent of data sent, and integrates the Resque async handler directly into the gem to streamline user experience. Additional improvements include the separation of GET, POST, and JSON body parameters for clearer error analysis, inclusion of Content-Type and Content-Length headers in occurrence details, and a series of bug fixes such as resolving serialization issues with DelayedJob and improving validation reports with ActiveModel objects. Users are encouraged to take advantage of these updates and provide feedback through pull requests, with an invitation to trial Rollbar for further enhanced error management in Ruby applications.