You guys should do the live casts for Vintage at BoM. This way, I can lend your power and win the tourney with Humans.

I like how it was long, I watched it in 2 waves. Just saw it as 2 podcasts, nothing problematic about that.
So, you talked about Loa again, and on top used Cavern of Souls as a semi answer. Interesting, but the problem still remains, with full acceleration and access to cheap removal spells like Lightning Bolt, it is relatively easy to get rid of Thalia or Dark Confidant and still stay in range of the '7 cards in hand condition' to get more draws of Library. Misdirection and Mindbreak Trap are actually very strong against Abrupt Decay. They protect your crucible, a Decay target, for example.
That being said, I agree on a point; Not always would multiple library in hand be a good thing, or missing a colored land drop.
But even one Sapphire/Ruby or Black Lotus change/swing that in favor of the Loa user. It is not hard to get ahead and stay ahead with a Loa, if the opponent didn't get a wasteland and you get a bolt (rather common isn't it?). So you guys think this should be allowed? A single land to take over the game very early on. I think another problem is, while a player is taking advantage of a Loa, the player is also building towards a Jace (because Loa also gives mana don't forget that) and once Jace is in play, plus the assumption you probably used some removal on their threats, while drawing cards, it becomes really hard to do anything really. It is NOT easy to fight a land, even as a wasteland deck, with so much potential power on it. It is unforgiving and extremely efficient in what it does if not taken care of. And even if you wasteland it (the second option to fight it, next to trying to play threats (which can easily be removed)), they could just play another one. Also if they get to use it before you wasteland, they just started the game with +1 card. Oh well, these are my 2 cents on this Loa matter.
On Aether Vial: The Cavern of Souls pretty much replaced Vial. Sure Vial still has its own advantages, but Cavern is such a boost, you get a land drop, the uncounterable effect, and this is pretty much enough. Vial can come online the next turn for Gorilla Shaman or Deathrite Shaman but it is nowere near the Cavern+Mox into 2cc Human bomb. The strenght of some of these creature decks running Caverns is to throw in a couple high quality cheap bears very early on and put the pressure on them. Vial doesn't follow this approach. And that brings me to the real issue, topdecking a vial after turn 2. It is still playable, don't get me wrong, but you get so much more mileage out of a turn 1 Vial. The difference with a later Vial is huge, and this offsets me. There are some exceptions to this though, against a Magus of the Moon deck for example, it could get you out of a lock. Or a Chalice for 2. But these are rather narrow circumstances.
I think in todays Vintage environment, LoA is no longer the Library of I Win. With games so much quicker and compressed, the cost and tempo loss of missing colored land drops is pretty high.