Well, not really, if you create say a symbol in LO, group it… then it would be useful if that group became a block in a dwg file. Apart from great file efficiency. for example - counting light fittings, GPO’s… etc anything that might be represented in 2d linework in layout. Currently, all my curved symbol groups become multifaceted line segments - all exploded.
Frankly, I’m not convinced about the conceptual split of Layout / Sketchup.
If notation in SU was improved [say as a 2d overlay to a scene] I’m not sure why you even need LO.
Then all you need is a better way of handling multiple scenes [perhaps by nested tabs] so you could step through scene levels like we do with outliner.
For example, In Layout I cannot count the number of components in a model and table them without manually extracting that from the SU model. If I was still in the SU model the data would be embedded in the same model and hopefully some clever plugin developer would have created a way to present that in a SU Scene overlay.
Hope I explained that well?