Yes Visual Template Studio could be a great tool to improve the look of your site on mobile devices.

If you have a mobile or responsive template that doesn't look fine on mobile, using Visual Template Studio you can correct dimensions and positions for wrong elements using the Styles Dashboard.

Visual Template Studio is not a tool to turn your standard site into a mobile one, however it can be an excellent tool to help you in this process or if you already have a mobile layout that has some issues to be fixed.