Vuforia SDK full changelog

Increased small target detection (now detectable at 2-3x the distance) for Image Targets, VuMarks, Cylinder Targets, Multi-targets, and Object Targets
Developers can now access External Cameras through the Driver Framework supporting UWP and Android
Improved the tracking performance of Model Targets on objects low on features such as models with no textures
A new List type has been introduced to simplify access to collections of objects through the API. New List-based access methods replace deprecated index-based access methods.
Model Target databases generated with Model Target Generator 7.5 will not work with versions of Vuforia Engine older than 7.5
Fixed an issue that caused occasional crashes when performing a Ground Plane hit test
Fixed an issue where tracking would degrade when redetecting an object after tracking loss
Improved DeviceTracker performance when using FUSION_PROVIDER_VUFORIA_SENSOR_FUSION

Android:
Fixed an issue causing a black screen when the device is resumed from a long pause
Fixed an issue causing performance degredation on Galaxy S5 Mini