My layman guesses. The ratio of baryonic and dark matter remains unchanged because the new galaxies come with their own dark matter and we can determine the ratio from looking at individual galaxies. The amount of baryonic and dark matter in the universe goes up by a factor of ten unless the new galaxies are exceptionally small or large which would change this factor accordingly. Finally the amount of dark energy goes up to yield the observed expansion rate, no idea if that also means a factor of ten in which case the relative composition of the universe would remain unchanged.