So I got the last couple cards needed to put the deck together and piloted it at my local Wednesday Night Modern in a field of 31 players. I did not do very well in the event, although I had much more success in some pickup games while waiting for rounds to end. One thing to note is that every one of my rounds finished in under 20 minutes.
Match 1 vs Grishoalbrand
Game 1 I am on the play and land a turn 3 Goblin Charbelcher. With 5 lands out of the deck, I feel pretty good about it. He then reanimates a Griselbrand and a Boborygmos Enraged and throws some lands at me.
Sideboarding: I trimmed the Recross the Paths and two Sylvan Caratids for the two Relic of Progenitus and the Scavenging Ooze.
Game 2 he turn 3 Through the Breachs an Emrakul, the Aeons Torn. I lose after losing my whole board.
Pickup matches vs G/R Tron
Game 1 he plays some Tron lands and has natural Tron. He casts a Wurmcoil Engine, and I belch for 42.
We didn't bother to sideboard since it was just for fun.
Game 2 he Through the Breachs an Emrakul, the Aeons Torn at me on turn 4. I proceed to lose. Against Tron or other decks that maindeck artifact removal, it is best to play Goblin Charbelcher as a seven mana sorcery that reads "Win the game". This slowed us down too much though against Through the Breach.
Game 3 I play a turn 3 Goblin Charbelcher with a backup in hand. He Karn Liberated's it, then I cast the second and belch him for 14. He minuses Karn again and takes care of my second one. I then play Assault Formation and kill him with my Wall of Roots.
Tron getting turn 3 Tron every game is a bit discouraging.
Match 2 vs G/W Relicblade (Quest for the Holy Relic and Argentum Armor with some hatebears creatures. Squadron Hawk MVP)
Game 1 he plays Quest for the Holy Relic. I go two Chancellor of the Tangle and Forest into Sakura-Tribe Elder and Caravan Vigil into Traverse the Ulvenwald. Turn 2 Goblin Charbelcher, turn 3 lots of damage.
Sideboarding: I trim the Recross the Paths, one Assault Formation, and two Sylvan Caryatid for three Nature's Claim and the Fracturing Gust. White has a lot of nasty ways of shutting down our belcher.
Game 2 he leads on three Leyline of Sanctity into a Quest for the Holy Relic. I grab a Forest then Nature's Claim the Quest. He then stumbles on lands and I kill him with Assault Formation and walls. The Pithing Needles he draws aren't relevant.
Pickup matches vs U/R Delver
Overall I go 8-1. 6 Belches and 2 Assault Formation kills. He gets me when he Remands my Goblin Charbelcher and then gets to Mana Leak it later on. I honestly don't remember all the details.
Match 3 vs Abzan Company
Game 1 I get a Goblin Charbelcher and activate, deal a measly four. He untaps and gains infinite life.
Sideboarding: Took out four Assault Formations and two Sylvan Caryatid. Added in two Firespouts, two Relic of Progenitus, one Scavenging Ooze, and the Fracturing Gust. I didn't know if he had any impressive artifact/enchantment hosers, but Fracturing Gust does it all. Abzan also gums up the board too much for my walls to beat down.
Game 2 he gets out a board of Birds of Paradise, Kitchen Finks, Fiend Hunter taking my Wall of Roots, Viscera Seer, and a Spike Feeder. I fire off my Firespouts and kill his board, getting back my wall. He scries a lot and leaves on top. Casts Collected Company hitting Anafenza, the Foremost and Eternal Witness. Witness gets back Viscera Seer and I lose to infinite life again.
Pickup match vs Zombie Dredge
Overall I go 3-2 in games. I win whenever I get a belcher, he wins when he gets nice dredges. Two ships passing in the night kind of stuff. The walls do great work against Prized Amalgam though.
Pickup match vs Boros Aggro/Burn
I go 2-0 in these games. Walls block attackers profitably. One game I belch him, the other I just beatdown with walls and Chancellor of the Tangle.
Match 4 vs U/B Mill
Mill has the unique property of making our Goblin Charbelcher not lethal. Honestly I was never expecting this matchup, but here we go.
Game 1 I never find a threat. He just mills me out after using Surgical Extraction on my Assault Formation.
Sideboard: Just add in three Leyline of Sanctity. The extra cards are useful.
Game 2 I get a Leyline of Sanctity. He scoops, then reaches for his sideboard and moves about five cards into his deck.
Game 3 he gets the mill plan online and Surgical Extractions my Leyline of Sanctity. I get a Goblin Charbelcher and get off two disappointing belches. At this point, he is at 3 life and I have about 20 cards left in my deck and two lands. I go for the kill since I know both lands are right near the bottom, and he Crypt Incursions me for 26 life. I belch once more, then scoop since I cannot win.
This honestly makes me tempted to turn Scavenging Ooze into Gaea's Blessing, but I doubt I'll run into mill too frequently.
Overall, takeaways is that we are great against the fair decks and are slightly slower than fast combo. Recross the Paths only did it's thing once, and so I might be cutting it for something like Wurmcoil Engine to up my number of threats. I'm also somewhat tempted to go down to 6 lands and add an additional Lay of the Land. Playtesting will ensue to test it out.
Comment sweep and hopes for more suggestions. Let me know if you do any playtesting, the data is always useful.