Timewise the free RPG day scenarios run quick, so that's a plus for short slot times.
If plan to expect all newbies at a PFS table run under CORE if possible so GMs get a chronicle, table cred. Players with pregens won't notice a difference and can then run it again (hopefully when the have a little more expertise) under standard campaign. Playing a CORE char in STD flips the char to STD campaign. It's a win-win for all involved.
If plan to expect all newbies at a PFS table run under CORE if possible so GMs get a chronicle, table cred. Players with pregens won't notice a difference and can then run it again (hopefully when the have a little more expertise) under standard campaign. Playing a CORE char in STD flips the char to STD campaign. It's a win-win for all involved.