the changes coming from this crash will be evolutionary (as in "bugfixes") instead of revolutionary.
Of course this will be the case. It has been so ever since the early days of regulated aviation.
No one is suggesting that we will ever go back to steam driven aeroplanes as representing the state of the art - in spite of the deluded and fond views held by many of us dinosaurs ...
From that sort of viewpoint, this mishap is no different to any other - an aspect of the investigation will be to look at what changes might be appropriate within the design and operating paradigms.
The interesting aspect here probably will/might be that the evolution may be more significant than what we might have seen in most previous mishaps ?