WordPress 5.2 will add a number of major improvements to the block editor - basically everything that has been added to the Gutenberg plugin prior to version 5.4. You can think of new block management features, as well as a number of new blocks that replace the core widgets. The new WordPress version will also introduce a new admin interface for Site Health, which can be found under the Tools / Tools menu. This allows you to perform tests that are categorized as critical, recommended or good, with action steps that users can use to improve their settings. An information tab is added for debugging, which provides information about the website and server setup.
WordPress 5.2 also includes a new feature called Fatal Error Recovery Mode. This feature "pauses" themes and plugins that give a fatal error message and puts the website in recovery mode so that you still have access to the admin to resolve the issue. With this new feature, the number of "white screen of death" problems must be considerably reduced. They will certainly be a lot easier to fix!