Hey,
just had a look at the playground again.
Most things work, except for CascadedShadowMap with autoCalcDepthBounds set to true and use of instances. If no instances are used, it works and if autoCalcDepthBounds is set to false, it also works.
Here is a playground: https://playground.babylonjs.com/#F7KZ7C#16
Hope it will be last imporevement and its battle-tested for 4.2 release