I really struggle to assign numbers to decks because the interpretation of numbers is both incredibly subjective and wildly inconsistent (it sounds like you have first hand experience with this inconsistency here). Instead, I'll try to answer a related question: "Is my deck stronger than precons, but definintely not strong enough for cEDH?" And that answer is a very easy yes, but let's see if we can conjure some specific ideas about why it's an easy yes.
The deck is obviously fast. There's a low curve, some powerful cost reduction, and tons of haste enablers. If left unchecked, I'd guess the deck could start knocking opponents out of the game within 6 turns with a decent amount of reliability.
The deck is definitely lacking in card draw. There's very few ways to generate card advantage (there's some card selection, but not much in terms of genuine advantage) so the deck will likely struggle to stay relevant in the late game or to rebuild after a board wipe.
The deck will hit hard. The inherently exponential scaling of Krenko and the natural aggression that goblin tribal typically allows means the deck will likely be able to close out games if given the space to do so.
Going back to the framework of power levels, this probably means that the deck is significantly stronger in the early-mid game than mid-late. You could average this and say the deck is a 7 or maybe you say it's a "fragile 8" meaning it starts as this powerful thing but will break apart easily if tampered with.