Do you want him to compliment Rodri or replace him when he's unavailable? I'm not sure why he would need to have the athleticism of Rodri if it were simply to compliment him. Like most Brazillian players, he has a strong core physique and a bit of devilment, so physically he should be strong enough. I do think that he has quite an odd running style, however, very short strides to cover the yards, so that can sometimes make him appear lackadaisical and slower than he actually is. He certainly doesn't have the height of Rodri but is only a centimeter shorter than Fernandinho, so I'm not sure if he could win aerial battles consistently. He does have it upstairs though, and that's increasingly the key attribute in our team.
At the price, I'd take the 'risk' on him for next season and see whether he fits.