Before HAKs, it was impossible to allow chest models of different AC tiers to be used, as the base properties of armors are linked to them. Now, existing models could simply be copied and added as separate chest appearances for these different AC tiers, without item properties changing as a result.
What I'm thinking is:
- Making all light armor models available for every light armor category
- Making all medium armor models available for every medium armor category
- Making all heavy armor models available for every heavy armor category
- Possibly allowing clothes with 0AC to look like light armor models and light armors to look like clothes