For his position at Chelsea, the most ideal is a striker, considering that Chelsea doesn't have a striker who is dangerous at the moment, choosing Nkunku is the right choice for Graham Potter.
Actually, Chelsea has a strong striker, Aubameyang. Unfortunately, Aubameyang seems hard to show his best in Chelsea, he experienced a difficult adaptation to Chelsea tactic. That's why Chelsea needs another quality striker, Chelsea needs a striker who fits with Chelsea game style. Having Nkunku in the squad will make Potter to have more options/alternatives in Chelsea attacking line. He can play with 2 strikers (Nkunku-Aubameyang), or choose Nkunku as a the striker if Aubameyang can't play effectively.
That's wrong. Aubameyang didn't suit with chelsea's strategy. it can be seen from his performance during his match with chelsea and he was rarely making the goal. I know that if chelsea got so many problems on the club but aubameyang's performance is far from what already expected by chelsea fan. Chelsea has been trying so many times to get the quality striker but the problem is since chelsea was always changing its formation and that would be so difficult to get the new striker that can suit with the strategy that used by chelsea.
Nkuku will come next year but im not sure if he will be coming in january. Chelsea was targeting some strong defenders for now like gvardiol.