The steps you take don't have to be big, they just have to take you in the right direction.
Atomic operations are those that either succeed or fail, with no partial failure states or error modes. Minimalism attempts to reduce design and action to its bare essentials or smallest gesture.
Therefore, atomic minimalism is an approach to improving the AO that attempts to only upgrade the AO from one stable state to a better stable state, without backsliding, introducing new bugs, or losing features. Moreover, atomic minimalism attempts to make the smallest possible useful change to the AO, rather than making a larger and more complex change to the AO.