Thanks Jacob!
I've already had some ideas to balance out Tactician a bit. Instead of just granting automatic success, it will require the model that gets the bonus to roll for actions. They'll still get the automatic success, but will also be able to generate failures. That means that a Leader with Tactician (2) could generate 2 actions, sacrifice them both to give two of his crew 2 automatic actions -- but each will have to roll 2 dice to get those actions, which means the first one could generate 2 failures (for an end result of 2 actions, 2 failures). This means the second model won't even get to activate and use his 2 free actions.
That will make Tactician more balanced, and bring it closer to how I originally envisioned it working i.e. the Leader shouting out a clear order that the crew member responds to.