Mikhail Shcherbakov presented on the diagnostic and debugging tools in Visual Studio 2015. He discussed the performance and diagnostics hub with features like PerfTips, memory usage, CPU usage, and application timeline. He also covered the unit testing tools including the extensible unit test framework, unit test isolation, and IntelliTest. Finally, he outlined debugging tools such as cross-platform debugging support, lambda expressions in the watch window, new breakpoint configuration experience, and the new exception window.