True, just that, taskbar is now even more broken, and it is intentionally by design from the big MS themselves. I used to simply uninstall crapware that didn't properly show itself on the taskbar. The sad part is, there is not much choice when the entire metro system is violating taskbar functionality. I still have a choice to boycott, but, it is not at per application basis anymore.
"More broken" in whose eyes? It works exactly the way I expect it work.
Why don't you explain how you think it's supposed to be? Is there some common knowledge definition of what gaming mode or slideshow mode or screensaver mode or movie mode is what applications are allowed to use it?