Quote from jweltFirst of all I think your primer is amazing! Go Goblins for moving to the established section!
Second - IMHO this is a meta game choice as well as a play-style choice. Sure, the mono red fast paced version of this deck is receiving some much needed attention right now (as it should), but how many people are actually testing Aether Vial with Lead the Stampede? It seems that because of the recent printing of boros charm, Skullcrack, and "extort" (such as on the card Blind Obedience) you might be playing in a burn-heavy meta. Which type of build is going to be better in your average burn matchup? I would put my money on the deck with better card advantage (LtS). Also, if you would like to reference it - I have been testing Modern goblins for a while with the following build as my most recent. People need to know that R/G Vial+LtS is a viable option (as you kind of hint at in the primer).
The Goblin Stampede...
DeckMagic OnlineOCTGN2ApprenticeBuy These Cards Creatures (30)
4x Goblin Guide
4x Legion Loyalist
4x Mogg War Marshal
4x Warren Instigator
4x Goblin Chieftain
4x Goblin King
2x Krenko, Mob Boss
2x Siege-Gang Commander
Other Spells (8)
4x Lead the Stampede
4x Aether Vial
4x Copperline Gorge
4x Rootbound Crag (**)
4x Cavern of Souls
4x Stigma Lasher
4x Tin Street Hooligan
4x Goblin Grenade
3x Magus of the Moon
Those who try it might find this deck less matchup dependent, better at recovering, and that it plays similar to a legacy goblin deck swinging in for the whole 20 at once (with the random T4 kill still possible but not consistent).
** Rootbound Crag and a couple mountains should be switched out for 4-6x Fetches and 2-4x Stomping Ground in a meta with less burn than mine (TY Franx).
This is by no means a comprehensive explanation of this style of deck, more of a spoiler for an alternate style of modern goblin deck that I have had some limited success with.
On a side note - some people might argue that Warren Instigator is worth keeping around because of its DS ability, with the lackey-effect being an added bonus (especially in combination with Legion Loyalist for trample).
By no means do I want to say that it's cut and dry that low-curve, Mono-Red is > Aether Vial versions with four and five drops. I'm glad you're trying it out and posting your experiences. I just know what has been successful for me and wanted to pass that along in here. I completely agree that understanding what you expect to play against, as well as the type of deck you will personally be most successful with is very important and easy to overlook.
I won't confess to having nearly the same level of understanding of your version of the deck at all. I have played Legacy Goblins and Standard Goblins in many forms so I've played with pretty much all of those cards, just not together. I do like your list the best of all the Vial versions I have seen, very streamlined with a strong mana-base. I will be sure to add it to the primer since it seems to be a good leaping off point for posters interested in that version.
As far as breaking down what the low-curve version is good and bad against, so as to compare it to a Vial version in terms of matchups, maybe that's something to add to the primer. It's a bit complex, dependent on each other's builds and other factors. For example, I believe that R/G aggro is probably the best matchup for Mono-Red Goblins that is widely played because the R/G aggro players have always looked at the matchup way wrong from my experiences. I think against better or more experienced players in the matchup, that might change.