Right - in general, I think something a little different from what other manufacturers are doing, but just general and vague enough to customize into with distinctive head and arm/weapon/shield options.
Cuirass with simple trousers, boots, and shirts would work fine by me, as does a cloth coat of some sort - and no reason why the same kit couldn't use both! The sort of thing that might as easily pass for a breast plate or brigandine, or a sort of greatcoat, smock, or gambeson, would be fine by me.
And with that in mind, after seeing what one WA customer was able to do by putting the Dark Age Irish cloaks on skeletons, I think we can add to this sort of "generic torso" thing things like distinctive cloaks and pauldroons/shoulder-armor to really customize this sort of figure in ways that would look very different.
In short, I think it might be the helmets/hats, gear, and shoulder and cape options that might really bring out more distinctive character in such figures, rather than the torso bits.
And yet another reason that the "Death Fields Accessory Sprue 1" is an exciting idea, to me, as is WA's inclusion of so many head, weapons, and other bits options in the other kits: a little variation in weaponry, shields, heads, and other bits can go a long way toward giving a given army a distinctive look!
So hopefully there will be things like multiple e.g. Dwarf Accessory Sprues.
Dwarves in generic costumes with soft hats, and miscellaneous weapons, including improvised items like shovels, mining picks, torches, and clubs? You've got a Dwarf militia or mob! (Or maybe they're peaceful civilian townsfolk, doing a job, if you're making a diorama or need non-combatant NPCs for a role-playing game., or maybe they're camp followers and engineers for a tabletop wargame...)
Dwarves in same generic costumes, with similar shields, helmets, hammers (or whatever), spears, and bows (guns, whatever)? You've got a Dwarf regiment. If you make multiple styles of these more or less uniform army items, and you get different Dwarf factions/nations! (Good vs. Evil, Law vs. Chaos, hill dwarf woodsmen vs. deep dwarf miners, whatever....)
Dwarves in same costumes, holding smoking pipes, tankards of ale, legs of mutton, fiddles, and the like? You've got a Dwarf party! (Or, bits to add some character to your dwarf army, militia, mob, diorama, whatever....)