Hi,
If you'd use Calibre and own a Kobo, I recommend signing up for the
Kobo Insiders program. They're running a poll on Calibre usage amongst Kobo readers.
I was interviewed by them a while back and mentioned Kobo working more seamlessly with Calibre as being on the top of my wishlist for new features, which may have sparked the poll. They may start moving in that direction if more people who use Calibre speak up.
So if this interests you, let your voice be heard!