Maybe you're right that the market ought to price these things in, yet I am not sure there is enough maturity in the market yet in order to be efficient enough. A lot of unknowing investors and lack of certainty means that fewer people are anticipating into the future.

As for ETH's shift, it is likely that it won't make much of an impact. Last time when they reduced the ETH issuance from 5 to 3 it didn't do amazing wonders either.