I understand that. I'm not saying that it should be done right away. There are people requesting this feature back in mid '14. I will open issue on GitHub now, but I'm not that familiar with MonoGame Development rules and how it is all fitte together so I would need help.
We have our version of MonoGame with SwapChainPanel support, but in updating it is a pain. Ideally, someone with knowlege of how project are generated and how XamlGame class works can do this.
Only thing we have done is retargeted W8 project to W8.1 and changed all
SwalChainPanel. Support for
Exit() will be needed too. But, that's it.
Windows 10 support is great, but we have application in store now, W8.1 application...