With Ravnica, the deck has evolved into what I consider a top tier deck with the inclusion of Life from the Loam. The Dredge mechanic was made for this deck.
Let me talk a little bit about some of the different card choices that I have made and why I made them. First of all, Life from the Loam is simply amazing in this deck and adds a completely new dimension to the card advantage. Adding a Strip Mine into the deck I believe is important in various matchups as just casting an Intuition can get your entire Bazaar engine going while destroying land every turn. In the control matchup, this is key as there are times when the game stalls and if you are aggressively attacking lands while drawing with Bazaar, it is basically over from there. Not to mention, Life from the Loam is simply amazing against Stax as you can basically ignore their LD as long as Crucible doesn't show up.
I personally don't believe Life of the Loam is worth it. Green gives you nothing that White doesn't already give you. Versus control you have the superior draw engine, and if you want you can simply run a couple of [card]Boseiju, Who Shelters All[/card] to ensure your spells resolve without any threat of opposing Mana Drains. Versus Stax you are running less basics so I fail to see how this approach is better, plus post-board you have access to [card]Sacred Ground[/card] which simply kills their Land Destruction and their Smokestack.
Secondly, lets talk about Decree of Silence vs. Yawgmoth's Bargain. I have found that Bargain's primary use is to draw yourself counters and protection once the basic combo is out on the table. Decree instead protects your combo (uncounterable) and hampers any deck from finding their cards that can damage the combo. Also, early in the game, Replenishing only Decree into play while you search for the rest of the combo is very good, at least in my testing.
I actually think neither one of them is necessarily needed; however, if I were to run one it would be Bargain simply because you can discard it then Replenish it for a win in more cases than Decree could ever do. My real complaint with both of these enchantments is that neither one of them can be played normally, it's bad enough having to run two Form of the Dragon and three Squee, Goblin Nabob. Having unplayable cards in you opening hand sucks because this deck unlike Dragon wants

{U} or even

{2} up before it wants to play Bazaar, so unplayable cards in your opening grip is like taking a mulligan.
Deep Analysis virtually wins you the control mirrormatch. Getting an Intuition through finding 3 Deeps is a real strong play, because they draw so much cards. Sure it's bad that the can be Drained and they'll get 4 mana, but there's nothing you can do about it
I've cut Deep Analysis from my deck. It really does suck to get it drained or misdirected, and it is hard to prevent those things from happening because it is a sorcery. The risk/reward ratio just isn't worth it in my opinion, at least with Replenish it is likely your going for a game winning play. Instead of Deep Analysis I just run two Boseiju, Who Shelters All. The effect is the same in the control mirror without the drawbacks, and versus Stax it is an extra permanent when I don't draw another more useful land. I just don't count them as a land that I am depending on for mana, but rather I count them as a disruption slot.