I see the point for Wyll, but Shadowheart I don't see why she would need DEX for. Equip her with Lae'zel armor and she's a decent tank. I would actually rather specialize her in heavy armor so she can get a full plate when they are in the game. And her spells are more to help rogues than for herself. She definitely doesn't have the stats for a sneaky character. There will probably be some +1 or +2 dex items later in the game. It will be enough for her.
Wyll needs it for his survivability for sure.
She's still -1 to AC in Laezal's armor. On top of -1 to two of her trained skills (stealth and sleight of hand), -1 dex saves (ray of frost bait), initiative, etc.
She can have the exact same stats and a 10 Dex. Or at least put the racial +1 into Strength rather than wasting it on her dump stat. Shes intentionally poorly built.
