You may be happy to know that we already provide very similar functionality with JustCode! With today's JustCode, you can easily decompile any method or type directly from Visual Studio, just as if you were going to the definition of your own code. You can see the feature in action here:
Today, this is not something that is automatically triggered during debugging (i.e. we do not yet support debugging in to decompiled code), but it's something we're definitely considering.
In the meantime, hopefully JustCode gives you some of the Visual Studio decompiling integration you seek. You can download a free trial here: