I try to stay educated about modern physics, but this article leaves me scratching my head. The idea that time is just a measure of change, and all we really have is sequences of observations and a causal structure is not new at all. I have seen "timeless" proposals (for instance Julian Barbour's ideas) that seem both more radical and better supported than what I can understand of this summary of the work.

I can't tell if they are proposing something new, or just trying to change some of the vocabulary and mental models we use for current physics.