I have a bid submitted for 2 of us from Plus -> Biz on EWR-CPH in a few days (below current minimum). Right now I don't have seat assignments, and the seats in plus cabin are starting to fill up. Should I go ahead an check in at T-30 to get seat assignment, or will that make the upgrade bid complicated?

BTW the flight shows fare availability per below right now. Does that mean biz still has at least 7 seats open? I thought J was full fare business so am not sure why J0 C7
C7 D5 Z2 J0 Y7 S0 B0 P0 A0 E6 M3 H2 Q0 V0 W0 U2 R0 K0 N0 L0 T0 O0 G0