Thanks for the comment! Ruins is an okay shout, but it in turn makes us run into more situations where
Castle Embereth comes in tapped. So while it would be handy as a way to close out the game if it goes long, the trade-off of increasing our risk of taplands seems very high.
As for SGC, I actually had
Legion Warboss in the slot for a long time as a cheaper, consistent token producer, but I've actually really liked the couple of copies of Siege Gang topping off the curve. It's expensive but it gives us 4 additional bodies, some wrath insurance and a highly synergistic card with Torbran. He also avoids the cavalcade nonbo by letting us swing in and sacrifice any blocked goblins after the trigger.
Likewise with Bushwhacker, while I wouldn't be opposed to finding space for it if I can, what's great about cavalcade is the permanence of the effect. In practice, the deck actually plays pretty grindy for the most part, and chipping away consistently regardless of blockers is often the difference between winning or getting overwhelmed by something like an Oko.
With all that being said, I'd be interested to see a more goblin focused deck though! Replacing the tremors/cavalcade plan with some piledrivers and 1 drops would make surging a Bushwhacker more consistent and lead to some crazy turns!