From what I've seen and observed myself, most armor traits in the game have a use. While Divines is very popular for the damage boost (especially on Twice-born star), there are a number of armor traits that are useful for non-DPS or certain builds
Always-Useful Traits
Divines - Used and sought-after on most DPS and Healing builds. Highly popular, especially on Twice Born Star gear.
Impenetrable - Extremely sought-after for PvP, as it mitigates high-crit builds
Infused - Used primarily on tanks, for larger pieces. Combined with prismatic runes for resources.
Sturdy - Used primarily on tanks, for small pieces. Saves a lot of stamina.
Occasionally-Useful Traits
Reinforced - Solo or tank oriented-trait, used on large pieces for raw defense. Second-tier trait at best.
Training - Used for leveling primarily.
Intricate - Drop only. Explicitly used to speed craft skill leveling and to recover materials.
Ornate - Drop only. Explicitly designed as vendor Trash
Prosperous - Only useful for farming. Explicitly for farming.
Not Useful Traits
Nirnhorned - Expensive for little gain. Grants some spell and physical resist, however reinforced is better for physical resist and divines/impen/sturdy/infused is preferred in almost all situations
Well-Fited - Used almost exclusively in roll-dodge builds and nowhere else
Two of them, Well-Fitted and Nirnhorned, stand out as being significantly weaker than the others. I've not seen any serious builds utilizing either. The trait's could use a small revision to make them more desirable for other builds.
Well-Fitted : Personally, I would love to see either a boost to damage shield duration (0.5-1s per piece?) or damage shield amount (2.5%-5% per piece) In addition to the roll cost reduction. That would make this trait very desirable for classes that utilize shields (magicka sorcerers and DKs, healers, mag-focused tanks)
Nirnhorned : Considering the expense and rarity of this trait, replacing the raw defense boost (which is not really used by anyone but tanks to begin with) with a damage boost per piece? (2% on large pieces, 0.5% on small pieces. Resulting in 8% total boost, or equal to minor berserk. This is less than TBS would grant with divines, but makes it more desirable on other pieces. Mixing Nirn large pieces with divines small pieces would probably net the best boost.)
I would like your opinions on this. Naturally it will not happen, but hearing thoughts on adjusting these two traits would be nice. (Also, it would be nice if prosperous and training had less weight in the drop tables.)
"Adapt. or Die."