This is more of a heads-up that I'm working on this. The intention is to submit a pull request into the PSF Git to add the functionality in. Changes are mainly to TraceShim to allow output to ETW, ...
Check out the PSF Monitor, a GUI tool that will help you create fixups easier, it is live on our GitHub. Thanks Tim for this great addition!
https://github.com/Microsoft/MSIX-PackageSupportFramework/tree/master/PsfLauncher#example-2
If you have new ideas on how to improve the Packages support framework please go ahead and submit it here - https://techcommunity.microsoft.com/t5/MSIX/idb-p/MSIXIdeas
I also encourage you to contribute directly to our repo, it is open to all of you.
Thanks in advance!
Vlad