Hi,
(1) The ForestSet > From Layer feature doesn’t create a live link to the source objects, so there’s no dependency between them and the Forest object itself. That said, you might find the following property helpful, as it lists the names of these layers:
$.layernames
Using Maxscript, you can use this property to quickly select all objects from those layers and export them. I hope this helps.
(2) We’ll take this into consideration for future updates. However, since these icons were changed fairly recently, we’d prefer not to update them too frequently. Thanks for your understanding.
Best regards,