Well, Yannic is kind of absurd in Freikorps. Azahul is right about that. We've been talking a bit about engineers interacting, but we haven't really mentioned the Steam Trunk in the room here. His Armory ability really shifts this into overdrive. Consider what Yannic might allow you to do on the first turn in wedge with VS2, Trunk, Hannah, Arik, Yannic, Metallurgist, and 2 Engineers for example:
Steam Trunk activates and give boots to Von Schill 2 then moves up a bit ahead of the wedge to establish position for future activations
VS2 activates, drops scheme, leaps (removes marker to exchange boots for rocket launcher and draw card; boots go to Hannah), focus, shoot with launcher feeling free to burn 1-2 severes to make sure you're pumping out plenty of damage (RL goes to Hannah), Stoic nod Hannah (attach something)
Engineer activates and, if the opponent hasn't made you use your discard, you have TFTJ to grab it. Then, move, interact, use you bonus to draw cards 2 & 3
Hannah leaps, interacts, shoots RL (using focus from VS, siphon, and feel free to burn cards; exchange for shield and pick up marker for card 4)
Engineer2 activates in a similar manner to the first and draw cards 5 & 6
Metallurgist activates, move, interact, bonus to attach upgrade to Arik, draw card 7 (which you attach is highly dependent on board state this could be RL or boots)
Yannic can activate now to set up Arik and interact, bonus to draw card 8, and leave a marker for Arik (plus take an action)
Arik activates and probably isn't drawing a card, but depending on what everything looks like he could draw a card if you're shooting the RL, but probably not.
Potentially you're drawing 9 cards with two instances of TFTJ and a arcane reservoir. With Iron Heart you can actually start this process immediately (without activating the Steam Trunk) since VS can attach the boots to himself with Stoic Nod. I like moving him to a better spot though. I love starting the first turn with a rocket launcher or two! It's so easy for Freikorps to dish out 6 damage with these things.
Clearly a savvy player isn't going to make this easy. They'll stay out of range or get in your face, but if they get in your face you have VS, Arik, and Hannah.
Now, we've just talking here about Armory (and to a lesser extent the bonus actions on Engineers and the Metallurgist) but with OG Von Schill you can durdle a bit and have that exact some crew (exchanging titles) draw nine cards and get a pile of focus with Shouting Orders and have a god hand for turn two. That's probably too many cards to draw if you're not burning them like you were in the first instance but you can sure do it.
Like others have said, there's a lot of discard in Freikorps and I don't often leave Yannic at home.