Do you think Spell Queller is necessary when we can run Freebooters and Sin Collectors? What creatures are we trying to hit? I can't think of any that Reflector Mage and Path don't already take care of, outside of something like Etched Champion, but I'm always up for being proven wrong. Also, I think needing separate blue and white mana outside of our Caverns and Territories is potentially rough.
I think you're probably right - the Quellers don't work with the Unclaimed Territory. In Knightfall lists with the higher number of fetches I like them better, but on reflection the mana doesn't support them in this version. If the mana did I like them as a catchall card, albeit a reactive one, and as a flyer, but your list has this in anyway.
I'll have to catch up on the SCG Open, good to see Humans getting an airing at least. I saw in the comments posted after BBD played a HUmans list recently that he seemed relatively positive on including Thraben Inspector, but I don't know what I would cut for them - we need our critical mass of 3 drops for CoCo to be good, and the Champs and 6+ mana dorks are a given in the deck.