Niagara Button, all slide directions

I love using the Niagara button for other apps I don't want on home screen but are used often.. I use slide up feature for some games that I play but it would be great to have slide down, left, right options for more widgets or apps.

It would keep things elegant and clean, just the same but give so many more categories or options for apps or widgets at your convenience. It's similar to another idea where multiple favorite lists would be smart.