Currently when you import an FBX file of a scene or model to be interacted with ( within which the artist would have set up the various separate models, possibly parenting and animating some of them to reflect the required result ), the same hierarchy in the modeling package should be reflected in PlayCanvas.
Take an example of a car - the artist has modeled the car, and has separately modeled and animated the 4 doors, as well as the boot/trunk and hood/bonnet.
In other packages that I’ve used, these FBX models are imported and are presented in the same way, making it relatively easy to interact with the scene - and more importantly, for the artist to update the FBX and for it to be merged in easily.
With PlayCanvas, the scene comes through as a single entity, with no way to access the individual models.
This takes relatively simple single export and import process, and turns it into a laborious task of multiple exports, one for each part. This of course costs time, and also adds in more opportunity for error.
Having a tick box to allow for the FBX hierarchy to be preserved would be of great benefit to speeding up and simplifying workflows.