In fact, any human with what would be considered a normally debilitating mutation that is waited on hand-and-foot may be considered royalty to an alien observer. ( as we can be considered to e-coli)
So this can mean that a "beneficial" mutation can be considered relative to the mutant and the observer.
Also, from a Darwinian perspective... it's still e-coli, not some new organism. Is this really a proof of anything?