Yes, I am aware of those other methods, but those other methods require me to "search" too much.
1) Usually the .bal files are mixed in with other asset files, so I have to scroll through the list and visually search for the layout I want.
2) The other method requires me to switch to the module(s) that load that layout and then again scroll and visually search for the line that loads it.
Besides, the current "Designer" toolbar menu always seemed not quite right because it only has one menu choice - almost like why even bother to have a child menu option and force the user to do two clicks to open the designer - why not just launch the designed just by clicking on the word "Designer".
So, by adding the list of layouts to the same menu level as the "Open Designer" menu selection, it would just add so much more purpose to that lonely toolbar entry and give it the respect it deserves!