Here is how my Output window often looks while TDDing with Isolator:
With five-deep obfuscated Isolator stack traces such as these, I often have to break TDD flow to go scroll up the Output window to see what the error was. I could of course make the Output window large vertically so as to not have to scroll up, but doing involves a not-insignificant readability diminishment for the tests and the code. If somehow Isolator can elide entirely that five-deep section of the stack trace, that would be a great day for programming.