I have kinda lost interest in the MCU and as such haven't kept up with the most recent CRTs, but after thinking about it for a bit, I think I will agree with this.
With the Hadron Enforcer being said to destroy moons and the above scan of Rockt being able to create planet-leveling weapons, there is a pattern for his weapon being moon/planet busting, so the energetic output of the Snap would be superior than that. Rocket is also incredibly smart (GotG Vol. 3 goes in depth about how smart he is), so there is no reason to assume that his statement isn't reliable. And the fact that he have seen a 5-A destructive event in the recordings of the Collector and still safely said that the Snap was a energetica surge of proportions never seen before makes the Snap scaling higher than Eson's feat pretty solid to me.
This would also fix the several scaling issues that the current profiles have. The issues I am referring would be: the fact that a full power Surtur, who scales to at Least High 6-A, possible 5-B was unable to destroy the container of the Tesseract (What if Season 2, the episode with Kahorri, given that the only difference here is that Surtur simply succeded in his destruction of Asgard there is no reason to assume he is thousands of times weaker than his main variant)