I like that the Goblin has the Wall of Roots feature of being able to plan interesting sequences that involve activations on both your turn and your opponent's.
From playing Citadel Siege, I can say that two +1/+1 counters is so so much more impactful than just getting one. It's like time walking a creature evolve style. The goblin is probably broken. It's a 5/5 on T3 with minimal effort and with synergistic cards, you aren't even losing anything. Goblin T1 into something that has an ETB effect T2 into Finks T3 is laughably good.
Which would you include if you could:
a) Pick only 1?
b) Pick 2 out of the 3?
Pick two: Gerrard's and Tidehollow Sculler, but I'd rather have Underworld Coinsmith than Sculler
What if it only got a single counter from each sac?
What if it had the Jackal Pup rider?
What if it was an artifact or enchantment creature?
What if it was a zombie goblin warrior?
What if I shouldn't have had coffee this morning?
Which would you include if you could:
a) Pick only 1?
b) Pick 2 out of the 3?
Don't they fill separate roles though?