I am no expert on the mining things, so I talk my economist view in general:
Reading the comments it seems that pretty much everyone agrees that the change in the emission is fundamentally better. All of the concerns revolve around profitability and price action.
In general, when decision makers try to please the markets, it is a race to the bottom. Markets extract their short term profits, but then move on, because the fundamentals got weaker.
Therefore, I think the price impact should not be driving the decision. It is impossible to model the market reactions anyway.
What is best for Ergo’s fundamentals and sustainability, should be the decisive factor. Markets will align.
Edit: Ergo has also been consistent in communicating its dedication to sustainability and strong fundamentals. I believe that this is what the markets (or whale supporters) also expect. Therefore, trying to please the markets might even lead to a lower price. In reality, there is no way to know for sure. Which is why the price concerns should not drive the decision.