Well, he's 19, ofc he's raw. Most players his age are. We are just spoiled with Yamal and Cubarsi but they are more expception than the rule. Young players need time to develop.
Lewa at his age was still in Polish 2nd division. Gyokeres played in Sweden and Isak in Dortmund 2nd team and then loaned to Eredivisie. Not to mention someone like Vardy who was stuck deep down in non-league football (7th or 8th tier) and didn't make breakthrough to PL until his mid-twenties.
I just look different at strikers than most people here. I don't care about their technical abilities that much. I'm much more interested in their attitude and hunger for goals. I like(d )Suarez, Cavani, Forlan and Darwin (though didn't really make it at Liverpool so far still believe he would benefit from a change of scenery) who always play(ed) with that Uruguayan garra.
While different profile I think personality wise Roque is much closer to them than your traditional Brazilian strikers. And that's why I believe when he'll figure it out and start converting chances into goals he'll become one of the best young strikers in the world. Sadly won't be here because we really fecked it up. Should have let him in Brazil until summer and now use him as a sub for Lewa. Can't convince me Flick wouldn't like his fresh legs and pressing late in games.