Unless I misinterpreted your meaning, realism in the context of metaphysical realism does not obviate an objective world, it just ensures that we include "us." Information gathering machinery does only half the job; we are also information users, and knowledge is theory laden, not merely made of data.
Although Einstein was known to experience by his account a "kinesthetic" feeling that his theory imparted, that feeling was prior to the physics, and realized first in the abstract, in the mathematical completeness of relativiity -- certainly that is metaphysical realism at its best. (Personally, I feel the same about string theory; beauty, completeness and symmetry seem to come in a package.)
We do not experience spacetime directly -- all of our measurements are taken between mass points, not spacetime points, as Einstein (and Mach) recognized, in the attempt to have all the properties of space determined by matter. The field influences of the continuum turn out to be quasi-Euclidean, however, unbounded in space though finite in time -- and thus nearly flat, not what one would expect from a closed, isolated dynamical system. There is a large discrepancy between the baryonic matter we see, and that required for such closure.
So there's more to stucturing scientific theories than gathering data. Good theorizing could never survive on that principle -- the mathematical mess that still characterizes quantum mechanics is a good example of theory-after-the-fact. Einstein would still say: "It's so ugly."