I holeheartedly agree, that the layout of classes, layers, and sheets only serves to perpetuate the confusion about these items. Sheets are so essential to the file structure, yet their placement makes one think that they're not supposed to be used. I would love to see a sheets menu where the order of sheets can be organized; a save current button, that allows you to save the current look without having to retype the name; a window of layer/class/sheet stats that allows the user to know which classes are on what layers, what layers are on what sheets, etc. If these features were in the program people would be encouraged to make more structured and effecient files.