Hey @adm2tech ,
Transitioning from down to up state for the interface is big disadvantage, especially with LACP. First you need to wait for the physical layer consider interface connected and then wait for the LACP to negotiate.
I personally have always used auto for secondary member interface status when deploying HA and really haven't had a use case to require or to benefit from shutting down interfaces on passive member.
I cannot think of any other downside for option 1, but I don't see any benefit from it either.