Getting ST cards that are too much out of synergy with the faction reworked.
An example is Milva, who as it stands basically isn't logical at all, since you'll almost never get back a cards that you really want to replay anyway, except an enemy spy or Dennis. She would actually work far better if it wasn't the highest unit on your side, but on her specific row, for example.
Another example is Eleyas, since a card that kill your unit to work has synergy with deathwishes or resurrecting, but ST has none of those. Reworking so that he works better with other units would be cool. Like for example, move an enemy unit to your row on their side, damage it by half of it strength" would usually be better.
Another example is Malena, not enough strength for her effect when on your side, too much strength when on your opponent's side. Just having her at 7 strength when on your side and 1 strength 6 armour when on the enemy side would obviously be already better, but simply changing her effect to be a loyal unit that drag ONLY ENEMY UNITS to the row facing her would be far better, as currently there's not enough unit doing that in ST. With that kind of card, Iorverth would actually be a fine combo with Malena, without even needing to change Iorverth. Iorverth's problem is not that he's weak, but that ST is too weak when it comes to moving enemy units.
On the same idea, I hope that one of the ST bronze will be specialized in moving enemy units (like the dwarven mercenary is specialized in moving allies) even if he can move both.
And I hope for some silver / gold (either new or reworked) that can bring interesting synergy with mulligan as well.
Maybe one single ambush card (that could be related with mulligan or movement actually, nice and cool way to tie everything together). Like the condition for that ambush card would be to trigger when you mulligan, or when an enemy unit is moved to the row facing that card, and so on. That would be pretty cool.
Like, reveal itself when you mulligan an unit, and buff itself by the base strength of that mulliganed card. Or when a card is moved to the row facing the card, reveal and deal X damage".
And so on. There's plenty of cool stuff to do with ambush cards, but that would make more sense to have synergy on the effect or trigger condition related to existing archetype, rather than having an ambush archetype again like in CB.