Our customer base skews heavy mobile, and so designing our pages to look great on mobile browsers is a top priority. While you can "preview" what your page will look like on mobile in the preview tab, it would be really helpful to be able to use a mobile view when *building* your pages in the editor.
I use the awesome CLEAN theme, which allows you to set modules to be viewable on Desktop, Tablet, or Mobile — which is great because I can make some modules only viewable on Mobile and design for that specific use case. The problem is, when I set it to "Mobile only," I can no longer see it in the page editor 😶
As mobile becomes a greater share of traffic, making it easier for your customers to build pages for mobile feels super important!