If editing the order is available this may actually be a big step forward with regard to access.

Now we may have our desktops set up so that short-cuts are available to our frequently used programs. The trouble is, if you are on desktop 1 and the shortcut you want is on desktop 3, you have to sail through another desktop first. That is if you remember correctly where it is located.
Many times I end up sailing through them all because I loose orientation regarding relative locations. It may be on the next desktop over but it is the desktop on the left and I went right.

This way, 15 of your most frequently required shortcuts can be configured to the top of the app manager and they will be always just one screen away...
Kind of like having a 5th widget-less desktop now available at the push of a button from all the other desktops.