Great ending. Owen pretty much HAD to die (How long could they keep up the whole 'dead but not exactly dead, easily damaged, can't repair' thing?), and Tosh not suffering perma-angst over her unrequited love for Owen would have been a bit dull. Killing a character or characters off is always better than writing them out, only to bring them back in a half-baked storyline when their acting career's gone up the spout... that said, good acting all round, apart from the actor playing Gray- Awful! After they buried Jack, he would have made a good tombstone, you know?
Oh, and I had a lump in my throat, if I'm being honest. Lol.