I'm really pleased to have 2 sides mesh that eliminates the need for double faced grass and plants! But I have so much grass and plants in my scene that, even if the models are updated, manually updating the in-world objects myself is a daunting task.
I'd love to one day have a feature that, when an object receives a store update and the buyers receive updated copies (something I know you want to add for us), it also gives a notification in scene edit mode that an object in your scene has been updated. It could then give an option to update none, one, or all instances of that object.
This would be very helpful moving forward as the marketplace becomes more and more active!