[General] Impedance of differential pairs not always 100 Ohm, very thin traces (0.075mm)
Impedance for 100 ohm DPs (calculated with saturn PCB toolkit): 93 ohm on L7/L8 (asymmetric stripline), 100 Ohm on L3/L12. Also the aspect ratio is pretty big for the L3/L11 diff pairs (0.075 mm width with 0.24 mm gap). Consider thicker substrate to increase track width (0.075 is quite technically challenging).