diff --git a/core/CHANGELOG.txt b/core/CHANGELOG.txt
index 3b65e8ef67..9937db9bfd 100644
--- a/core/CHANGELOG.txt
+++ b/core/CHANGELOG.txt
@@ -2,7 +2,7 @@ Drupal 8.3.0, 2017-04-05
 ------------------------
 - Added modules:
     * Added the Workflows module (experimental) which abstracts transitions and
-      states from Content Moderation into a separate component for re-use by
+      states from Content Moderation into a separate component for reuse by
       other modules implementing non-publishing workflows.
     * Added the Layout Discovery module (experimental) which provides an API for
       modules or themes to register layouts.
@@ -13,12 +13,16 @@ Drupal 8.3.0, 2017-04-05
 - Updated vendor libraries:
     * Updated to Twig 1.25.
     * Updated to jQuery 2.2.4.
-    * Updated to CKEditor 4.6.2 (with new skin).
-    * Updated to paragonie/random_compat 2.0.2.
+    * Updated to CKEditor 4.6.2 (with new Moono-Lisa skin).
+    * Updated Symfony components to 2.8.18.
+    * Updated PHPUnit to 4.8.35.
+    * Applied patch-level updates to the latest versions for all dependencies
+      wherever possible. Minor updates applied for Symfony PSR-7 Bridge and
+      Zend Stdlib, which Drupal does not depend on directly.
 - Browser support:
     * Advance notice: Internet Explore 9 and 10 will no longer supported from
-      8.4.x, due October 2017. Microsoft have now ended support for these
-      browsers. Drupal will still support Internet Explorer 11 and its
+      8.4.x, scheduled for October 2017. Microsoft has now ended support for
+      these browsers. Drupal will still support Internet Explorer 11 and its
       replacement, Edge.
 - Raised stability levels of experimental modules:
     * Updated the BigPipe module from beta to stable.
@@ -27,7 +31,9 @@ Drupal 8.3.0, 2017-04-05
       information about the stability levels of experimental modules.
 - Improved authoring features:
     * Can now drag and drop images into image fields in Quick Edit mode.
-    * Image fields are now limited to only accepting images, not also videos.
+    * Image fields are now limited to only accepting images, so that users on
+      mobile clients are not offered a confusing and non-functional video 
+      upload option.
     * CKEditor now utilizes the AutoGrow plugin to better take advantage of
       larger screen sizes.
 - Improved site administration experience:
@@ -66,8 +72,8 @@ Drupal 8.3.0, 2017-04-05
       request headers or request bodies, in dozens of situations.
     * Massive overhaul of the test coverage.
     * 403 responses now return reason why access was denied.
-    * Serialized boolean and integer values that used to be strings are now
-      booleans and integers.
+    * Serialized values for booleans and integers are now returned as the 
+      correct data type, rather than incorrectly typed as strings.
 - Improved performance/scalability:
     * Optimized class loader detection made more generic to support class
       loaders other than ApcClassLoader.
@@ -78,7 +84,7 @@ Drupal 8.3.0, 2017-04-05
       path is too long.
     * Improve statistics performance by adding a swappable backend.
 - Improved developer APIs:
-    * Various variations of routers merged into either AccessAwareRouter or
+    * Variations of routers merged into either AccessAwareRouter or 
       DynamicRouter to simplify the routing system.
     * Replaced the deprecated Symfony ExecutionContextInterface by subclassing
       from ConstraintValidator to prepare for an update to Symfony 3.
@@ -90,9 +96,9 @@ Drupal 8.3.0, 2017-04-05
     * A new property originalRevisionId has been added to revisionable entities
       to store the old revision ID after it was updated.
 - Changed coding standards:
-    * Switch to short array syntax.
+    * Officially adopted short array syntax and updated all of core accordingly.
     * PHP CodeSniffer and Drupal Coder have been added as composer dev
-      requirements, so they can be installed automatically with 
+      requirements, so they can be installed automatically with
       `composer install --dev` rather than requiring separate installation. (Do
       not use `composer install --dev` for production sites.)
     * Most global constants in Drupal 8 have been deprecated in favor of class
@@ -102,11 +108,16 @@ Drupal 8.3.0, 2017-04-05
     * Integrated PHPUnit verbose output in SimpleTest UI.
     * Improved backward compatibility with WebTestBase.
     * Improved backward compatibility between BrowserTestBase and WebTestBase.
+    * PHPUnit based tests now use the backwards compatible base classes to
+      make it possible to update to PHPUnit 5.x or 6.x later on.
     * Many old WebTestBase tests have been moved to BrowserTestBase.
     * Expanded automated test coverage for JavaScript.
 - Package management:
     * composer.json now uses the new official endpoint for modules and themes,
-      packages.drupal.org
+      packages.drupal.org.
+    * Custom modules and themes can now be installed to correct locations using
+      composer
+    * Added Package.json enabling new JavaScript language features.
 - Miscellaneous changes:
     * Incoming paths are again case-insensitive for routing, similar to earlier
       major Drupal versions.