In that formulation, addition of the thing has utility equal to minus the utility of removal of the same thing. And that only if addition/removal can be defined.

About states - there are too many of them, some are macroscopically different but irrelevant to human untility (I am next to sure it is possible to shift some distant galaxies in a way that many sapient being will be able to see different sky and none would care).

The meaningful thing is ratio of utility differentials between some states.