XNA isn't dead. Dead implies it doesn't work, isn't available, and isn't supported by Microsoft. None of that is true. The only truth is that there will be no more updates to XNA. If the current feature set of XNA meets your needs, there is no reason to avoid using it to build your game.
Right but it was never supported on WinRT (which is the Windows 8 "metro" environment) so it's not as if they are removing support. XNA is still a supported framework for all platforms on which it was ever supported. If its current feature set (including supported platforms) meet your needs, there is no need to avoid using it. Lack of future updates does not automatically render it useless.