He wanting to become the Juubi Jinchuuriki makes sense. But I think there is something that is not very well interpreted in your theory...
"Switch". What really Madara mean with the whole thing about Rinne Tensei was a life transfering, done though the control of the Black Zetsu. Rinne Tensei only transfer life energy to a certain target, nothing more than that, the whole thing about 'the link of the Bijuu/Mazou' is related to the Jinchuuriki's Body.
So, I think you may be kind of mislead when you state that the Mazou was transferred to Madara. What we know for sure was transferred to Madara this is Obito/Mazou's Lifeforce, you're kind of farfetching the extent of the Rinne Tensei Jutsu.
Now, let's talk about Proof.
a) I'm full aware of Mangapanda translation.
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And so you're probably interpreting Madara's current powers based on this one.
Now, let's look this one of ***********...
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Transfer is way different from Switch. Being a technique of the Rinnegan, the Gedo Rinne Tensei no Jutsu is the power related to those who can walk in the path of Life and Death, "the Seventh path of Pain" as it was referred once. As the Mazou is a live entity, Madara's powers can only control Obito, but not the Mazou in this point of the manga, so telling that the link was transferred doesn't make sense, since it is linked to Obito's Body, not to Obito's Life Energy/Lifeforce.
Now, going further, we could even tell that we should not trust in translations, so we should at least wait for the raw to get more accurate conclusions.