Since he was no Jin and Indra was the Father of the sharingan, Indra was born with all of his potential or skills set to be what they were, already, as confirmed as he was called a genius. He had the eyes. We pretty much know everything about the eyes now.
Ashura had the body, which we all know means he was the one who was better suited to be a Jin, just like Senjus&Uzumakis. So what if the chakra cloak is not something that even has to do with the Bijuu? What if thats the younger sons bloodline trait? Then when actually added with the chakra of a Tailed beast It takes on the characteristics of that Bijuu.
Ashura had the body, which we all know means he was the one who was better suited to be a Jin, just like Senjus&Uzumakis. So what if the chakra cloak is not something that even has to do with the Bijuu? What if thats the younger sons bloodline trait? Then when actually added with the chakra of a Tailed beast It takes on the characteristics of that Bijuu.