For now I think tables are best candidate for displaying large portions of information of the model in SketchUp, provided that you would use the Dynamic Attributes on Components. It only involves two steps : Generating a new report if anything changes and updating the CSV reference in LayOut. Using the label tag only involves one step in LayOut, but, as the OP stated, gets cluttered if there are many components to label. For now , Tables can be easily adjusted (Font,Style, reference etc ) and labels not.
In general, I think that the developers at SketchUp who are in charge ( @Marc 
) are listening to users who are actually ‘in the field’ managing large models and trying to cope with the boundaries of the software. These topics/threads displays it perfectly .
