I've taken time to watch a lot of all action videos of him. He's the guy that sit at the base of midfield and switch the ball from flank to flank, pass it into the feet of the center forward, pass it back to the defenders. Just general constantly get on the ball a lot and distribute. Out of possession he's a very capable ball winner, he's quite strong and uses his body very well to out muscle opponent. He plays in the same position as Casemiro but he's a better passer, probably not as good overall defensively but he has the same level physically.
If he comes here he'll be in direct competition with Casemiro mostly. They could play together but its something ETH would only do to see out games or vs the big boys. He looks good enough to really keep Casemiro on his toes, our options in midfield would be up there with the best in the league if he arrives.