Most realistically, the main alternative will be processes focused on product release. With a statistical acceptance of mistakes. Consider that Coke has a specific shade that they have used for a long time.

My main problems with efforts like this is that they cannot distinguish between different organizational priorities on design considerations and they make virtually no allowance for what different practitioners are using today.

That later point is the one that drives me the most crazy. We have very few tools that can help reconcile a graphic design to a website. Most of what we have are attempts to change how graphic designs are created so that they can be more directly transferred.