On 6.4 train Packet Capture was amazingly useful, it was possible to set it up and leave it running as long as needed on particular virtual, physical or VPN interface.
Non (ver 7.2.3) it is TOTALY USELESS - you can only run one at the time and as long as session is active
PLEASE DO NOT FIX what is not broken!!! - and give us great troubleshooting tool back as soon as possible!!! - I beg you!