squarespace Sidebar menu removal

Site URL: http://www.richardmead.com

Who in their right mind decided to remove the ability to include sidebars/menus on the 7.1 update? We're literally paying a premium for the Squarespace service and don't even receive the basic functionality you can get on a free WordPress site, or Adobe Portfolio.

When can we expect this to be reimplemented? As a disabled user, I find the sidebar/menus far more accessible to navigate with.