I agree. I've over RM500 balance in my old card and after the funds have been transferred to my new card, I'll withdraw all thr' ATM (no choice but to pay the RM6 withdrawal fee), then I'll terminate the card as much much cheaper to buy AA tickets at just RM4 per transaction  thr' direct transfer (MBB, PBB, CIMB, RHB, HLB, BI) vs using the new card which charge a high RM16 per passenger (means if buy for a family of 5 will cost a whooping RM80 vs just RM4 for direct transfer). Some more have to pay RM2.50 per mth if no transaction using the new card for each mth. Means the new card is even worse compare of using other credit cards as other credit cards no need to pay the RM2.50 per mth.

are you using old Big card to buy ticket?
May be can try using new Big card for booking.
There are big points for each passenger.