really funny! I understood that it seems very unnecessary function, but it is not. I need templates and it is nice to have the ability to change the appearance of multiple pages at once. Also, I need the book structure of the layout book and auto-text functions which connected to each view. Just for printing, I need this document to be on a single sheet. When I send a single PDF with multiple pages in it to printing because of the difference of layouts pages' sizes printed drawings lose the scale constriction. You can see the example of a print preview in the link. There are 2 pages with the same height but different width. As you can see on the print preview the drawings on the right scaled (cuz we know that the heights must be the same) and will not be printed with the correct scale.
A lot of people solve this problem as you mentioned before, but it is not right way cuz we lose some automation as a result. Thanks again, Mr. Ejrolon.