I have over 100 hrs of game time and I've spent a lot for schematic farming. Most of these are not in SP.
A lot of them are NPC outfits, though. At a guess, I'd say those only exist for one race and gender type, which makes it unlikely they'd ever be made available for the player (I don't know if there's any gender-restricted armor in the game).
The free army set and the battlemage sets are in the game (I think you can buy one of them in Haven, and there's another re-skinned version available as random loot or from one of the shops in Val Royeaux; the free army sets drop like candy).
There's already too many sets that are just "human-trained only" (because they're imports from DA2); I don't disagree that more variety would be welcome (especially for the other races), but I don't think the sets they're using in multiplayer are necessarily suitable for single-player.