The possibility to group tags in folders was one my favourite request. But I would like it could add the possibiity to change the view of the folders, as it is in Windows.
I often have the need to make order in the tags of the model, and I’d like to do it in full screen, also with the chance to have icons for folders and the possibility to show them in different way. The simple tree structure we are obliged now is not always the best way to work at the organization of a model.
The same could be done with the Outliner, which I think is under its potentiality because of its poor design. What makes Sketchup different from other Cad-like software is its friendly usability, and I would like to see it at the organizational part of it.