It does make sense but I'm not so sure, I mean if you can control 10 tails in the real world with only your rinnegan and wood style, then why would he need anything more to do it in his inner world? I think that Madara took Hashirama's sage chakra not to actually control the Juubi but to actually avoid doing the same mistakes such as his weakness against sage attacks. Now that he has it, he will probably be able to counter even them which supposedly are Juubi's jin only weakness. One last point is that when Madara became the jin he was already very powerful since he was at his prime and he even had sage chakra. Obito on the other hand was about to die. That being said, it is possible that controlling the Juubi is not that difficult while you possess the rinnegan but in case you're already to weak, there might be a problem till you get used to it.