Firstly: thank you, I love you.
Some of my thoughts (if anyone cares):
Saska looks fun and useful (though probably worse than Gideon the majority of the time). Gadgeteer seems essential.
My initial impression of Biv was much less favourable. He has poor mobility and poor multi target damage. If you upgrade him he can probably kill a regular royal guard with one activation (which is good) but other than that his contribution seems minimal. Into the fray makes him obscenely tanky though.
I love the flavour of chance cubes but they give expected 17ish credits (2/6*150-4/6*50) which is garbage.
The hunting rifle seems amazing, you'll seldom get the focus but it's a cheap long range gun that can weaken a target. The carbine is also good , it has slightly worse range than the a280 (i.e. enough) but noticeably more damage.
Leadership seems very weak early but very strong late. Field general + Lead by example is nuts.
I'm not sure I'd want to do the mini campaign unless I could do it in one session or over a weekend.
Edit: The other thing is both of these heroes are extremely based around their basic abilities.
Biv makes me think of a close-range tankier Mak, with close and personal I think he could take out a big target each turn. His strength seems to be more in dealing with single big threats as opposed to several smaller ones.
Hunting rifle looks like a great option for any support hero that doesn't need to be on the frontlines. Jyn could use it to weaken a target with her quick shot ability right before they get to take their turn, Gideon/Saska can use it whenever they have an action to spare to weaken or pick off a far away near dead target and maybe get a focus for a stronger shot next turn.
That's funny about inspiring leadership, cause I think quite the opposite. In my opinion the stronger cards are early on and the later cards are weaker per value. Supervisory agent is pretty much 2 free threat each mission for only 1 EXP. Press on is a free (but weak) heal each round for 1 exp. Compare it to technical support which requires nearby droids or military might's heal that costs threat. Strategic planning allows a near dead deployment group to still be useful. Got a deployment card with just a single stormtrooper? Sacrifice his turn to have an e-web, or something go again. Even better if you can get that stormtrooper off to a safe distance and hidden away... thats pretty much 2 activations for a deployment group per turn (of course if their deployment is low enough.) Noble sacrifice seems good to me, 5 focus can really change the tide of battle. And optimal tactics seems the better 4 exp choice to me.