Can you clarify what those key areas are? I recently been doing C# dev and I've been very impressed with Visual Studio especially coming from the web dev/java world.

Templating is better, suggestions are better, refactoring options are better, the search anywhere feature is better (VS's Ctrl+Q isn't bad per-se but it annoys me comparatively) and you can use F12 to navigate to binary sources and automatically decompile into them, which is invaluable when I just want to see what a third party component is doing without wanting to dig up its docs or source on GitHub. I hate hate HATE hitting F12 and seeing an interface contract, that's basically useless.

People keep telling me that VS is getting closer to feature parity, but when our volume license invariably breaks now and then and R# stops working, I find myself in strong anger in not much time. I worked for a time early on without it and I admit it's the sort of thing you don't appreciate until you have it.