Dies to Removal

Kyren Negotiations? If you're just going to the dome, it seems like leaving your team alive is better. Plus, it's pretty good synergy with summoning sick Krenko tokens.

I've never played one of these myself, don't know precisely how good Brightstone will be, but traditionally, emptying your hand in goblins is pretty ridiculous so long as you can find sufficient ways to refill.

I'd cut Goblin Razerunners, Piker, Tunneler, Leyline, all four of your non-goblin creatures, and I'm not entirely sold on a number of the instants and sorceries. Burn isn't typically very good removal in EDH, and there's much better ways to multiply your damage quotient, like Coat of Arms, Eldrazi Monument, Marton Stromgald, Rage Reflection, Gratuitous Violence, Breath of Fury, etc.

Krenko's Command, Goblin Chirurgeon, Thousand Year Elixir, Battle Hymn, Sparksmith, and Beetleback Chief all seem to be things that other Krenko decks are using, too.

Goblin Lackey, Warren Instigator, Shared Animosity, Furnace of Rath, Marton Stromgald, Akki Drillmaster (goblin that gives haste), Siege Gang Commander, Brightstone Ritual, Goblin Recruiter, Goblin Matron, Goblin Ringleader? I'd mention Piledriver, but he's a bit ridiculous now.

Seems interesting.