It could do with some updated propellers... those just look a bit crude (IIRC they are from 2008).
where could I find these updated propellers
I would also consider raising the superstructure up another deck. Right now it looks a bit too low to really "fit" with other period designs.
As for radar fits, it really depends on the year you're wanting to portray. If it's early (1940-42), put an early air search radar (CXAM, etc) on the foremast with a surface search (SG) on a small platform above the bridge. Late-war (1944-1945), place a more modern air search (SK, SK-2) on the foremast with an SG above it. Then put a backup SG radar on the mainmast.
This might help:
I'll think about the superstructure and thanks for the radar tips.