Yep. This would be one of those "features" that GS could do in no time and wuth very little resource, since all the necessary code is already there, just need to be organised. It would make life simple and users woud just love it, but no, GS spends tremendous resources into new things that don't work properly, then they dump these features, leaving them half done just to show: things could actually work OK if we finished them properly, but we don't care....
If someone says why don't you do custom profile walls to achieve this, that just mean, the person suggesting the idea knows nothing about model based documentation.
Walls arw walls, they need wall types. Finishes are finishes. They need finishes types. These things need scheduling and tagging. That just requires them to be modeled separately.
Combining elements is just useless.
Same as modeling a wash basin and the tap must be done with separate objects, because they need separate tags and schedules (you buy them separately at your local hardware store)
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