One of the benefits of using more than one development platform, more than one IDE, and more than one debugger is that you gain a better understanding of what your personal ideal development workflow looks like. It might well be the case that no single tool provides every feature you're excited about, which is what I feel these days. Because Visual Studio is my long-time (since 1999) favorite IDE and debugger, here are some features from other tools I'd like to see integrated in Visual Studio...
A few months ago I wrote about MPGO , a new Microsoft tool that ships with .NET 4.5 and enables profile-guided optimization of managed assemblies. Specifically, MPGO optimizes the layout of native images for managed assemblies, which reduces startup times, working set sizes, and page fault costs. Shameless plug: Pro .NET Performance has a large section dedicated to improving startup performance, and I’ve written about this before: Using Prefetch to improve startup performance , Rebasing and compression...