[Sync for home "cloud" scenario (Dropbox replacement)]

Resilio works the same way in PC or NAS and you will not be using SMB mount to sync your NAS folder.

https://www.resilio.com/blog/bittorrent-sync-announces-support-for-network-attached-storage-nas

[Syncing over the Internet Permanently]

Resilio has a global tracker server defined in http://config.getsync.com/sync.conf. They served to ensure that your other peer knows your other device new IP address.

[Set subfolder of Selective Sync to Sync mode]

Apparently this feature available. First of all to do this you need to ensure Resilio Sync context menu is activated (https://help.getsync.com/hc/en-us/articles/206214625-No-Sync-icons-in-the-file-browser-no-Sync-related-items-in-the-context-menu-on-Mac-Windows). Once activated right click on one the folder within your Selective Sync folder and select "Sync to this device" on the context menu. Once activated all existing and future files will be automatically in synced.

What will be helpful though is if it can show Icon to which folder which is running on full sync.

 

[PLEASE keep Sync KISS]

Not a solution but that the screen is in German and it is "Linking Device" prompt asking you to choose the default folder for sync and the default sync mode for new folders.

[Smarter Redundancy]

Are you using Pro version? If not, Pro version can have same view of by linking devices hence in your scenario when your Raspberry Pi goes down your Phone #1 & Phone #2 will send/receive to either your Desktop/Laptop.

[Compression]

+1

I am not seeing this feature available yet in 2.4.4, hope to see this implemented.

[Set subfolder of Selective Sync to Sync mode]

Let say I have a folder structure below and I have set /foo to be shared on Resilio. It would be great if there is a feature that allows /foo/baz/qux deep subfolder to be set to "Sync" mode while /foo is set to "Selective Sync" mode.

-foo
 |
 + bar
 |
 + baz
   |
   + qux

 

[Separately Sync Nested Folders]

+1 there will be many such use case