Tottaly crap AA and Gi...
When You use Power shader You must remmember abount correction tool (krayMultplyphoton) value 500 is good , but when You received Light leaks You must Increse it .
150 Power is too big, last tiime I tested good interior from V-ray with Power 150 but in Kray we don`t need that big. Enough is maximum 20. For Sun 4-8. beige colour. For interior Turn OFF sunsky (just deep blue background for blue reflection) rest light from sun and Area lights behinde windows (1-2 meters 50% size windows).
AA: FSAA G4 Cubic 0.8 after render Sharp or 200% render size with FSAA G3 Cubic 0.7 and rescale under PS Bicubic Sharper to 50%.
Some materials need fix: metals/chromes are too bright, plastic panels too strong reflection + need small blurr + big size texture with very small bump (plastic is not ideal flat...)