I think your modes are good.

Why I would not use scalable tabbles: Scalable would result in certain tabbles being larger, conveying importance. The way I use Tabbles means that even though I commonly use one tabble more than another it does make it more important. It just may be a more common. For example, one customer may supply 200 sample docs for me to work with. If I tag them all for that customer it does not mean that customer is more important than another.

Does that make sense?

-Matt