I think pinning the Software Boutique to the desktop would help less-experienced users figure out how to install software.
My grandpa uses Ubuntu MATE on his computer, and he likes it quite a lot. However, he is often unable to find the menu "to get new apps," per his own words. I think pushing new users to explore this would be greatly helpful. By adding it to be one of two icons on the default desktop, that may be the best way to do so.
Thanks for the great work on this project - you've saved my family a couple thousand dollars in computer costs!