Form is temporarily, Class is permanent
Werner will be back
In Chelsea, Werner gets only 1% of service unlike when he was in Leizpig; and also he is second on the chart for players with more big chances missed missing 16 big chances at just game week 31, so to answer you, Is Werner a good player? yes he is,
How do you come about with this statistics? It's absurd to think Warner has gotten only 1% goal scoring service at Chelsea this season, nobody misses a goal scoring chances than Cavani growing up but he still got a good number of goals to his name. Goal missed is not counted, goal scored is important.
Is he a good finisher? No, Can he improve his finishing? I don't think so, Chelsea is better off with another striker.
Warner is one of the youngest strikers in the league with over 100 goals to his name but you of all people think he's not a good finisher and can never improve? He is very young and there is still much room for improvement. Chelsea are doing better all thanks to Werner