We've got a zillion different Spinner sizes all over Dagit. This consolidates them into a handful of specific sizes matched to various purposes around the app.
Also, working on a couple other loading-state tasks recently, I came to feel like the speed of the Spinner is a little stressful. This reduces the rotation speed from 0.5s to 0.8s, which feels a little less urgent.
Additionally, I put a lint rule in place to prevent people from importing the Blueprint Spinner directly. Instead, they should use the Dagit-specific Spinner.