It should be clear by now that the considerations that might motivate the MRTJ today are not exactly what motivated Russell. For instance, we’re not worried about the truth-falsehood problem that seemed to motivate him, or by the existence of objective falsehoods. Those worries only get going if you adopt Russell’s somewhat idiosyncratic conception of propositional unity in which a constituent relation is required to relate the other constituents. Absent that theory of unity, you could unify the constituents of a proposition by the relation of set-formation or the relation of ordered-n-tuple-formation. If you did that, your propositions wouldn’t collapse into truth-making facts, and, your false propositions won’t look like non-obtaining states of affairs.