The Trust Characters take too long to do their attacks.

[Akonyl]

considering you have to lvl them all up after the MSQ is over.

You don't have to. The devs have stated that trusts aren't supposed to be competitive with real groups, so I doubt they'll take the time to tune them to be faster when the only reason to level them up afterwards is if you want a title achievement / to avoid players entirely (which they don't really want you to do).