I guess that most people that use Visual Studio had my same reaction when they created their first ASP.NET MVC project: where did the Design View end up?
If you are looking for designer to get instant feedback of the HTML/cshtml changes, this can be achieved by BrowserLink feature in Visual Studio. Fire the browser and hit the page/view you are currently designing and when you make any changes to the mark up/cshtml, hit the refresh button within Visual Studio, updates made to the code will be immediately pushed to browser.
Other alternate is to use Chrome Developer tools (F12) and using "Edit as Html" feature.
I know these alternates are not rich as native designer view support in Visual Studio, but these are some practical workarounds.