Hey!
Might be dumb, but it would be cool to see a little green, blue, or red dot on the syncthing logo in the menu bar, as a visual cue that everything is synced, syncing, or there is a problem (respectively,) instead of having to open the web interface to see that info.
There are several Syncthing βtrayβ options out there (they act as wrappers, essentially, for the core Syncthing application). What OS or OSes are you using Syncthing with?