Yes you can send your watch directly to Bienne. I would definitely have the seals checked at the same as the bezel fix, but it doesn't need servicing yet. Omega can do a pressure test while they have it :)
Is it still under warranty? You may get the bezel fix for free...
I believe you need to use the Contact Us facility on the Omega website to discuss directly having Bienne work on your watch, or you can send it to them via your AD.