Hi, I am a LibreOffice user in Japan.
I have tried to install LibreOffice using winget to set up 40 PCs for educational exercises. In the process, it is taking a very long time to download MSI (about 200KB/s ETA: 27min).
Using MTR(traceroute), I traced the download to the download server (downloadarchive.documentfoundation.org ) and found it to be very far away and slow! (23hops, and ping: 240ms) 
Next, I checked the download from the web. This one downloaded very fast (56.4MB/s in 6.0s) by selecting a nearby mirror server by redirect. 
- Try Download for
winget:https://downloadarchive.documentfoundation.org/libreoffice/old/7.4.1.2/win/x86_64/LibreOffice_7.4.1.2_Win_x64.msi - Stable:
https://download.documentfoundation.org/libreoffice/stable/7.4.0/win/x86_64/LibreOffice_7.4.0_Win_x64.msi
I think that winget should using download.documentfoundation.org and stable version.
I hope you will consider this proposal (Sorry if this isn’t the place to suggest it.).
Thank you in advance.