If you take off this armour:
Your AC would decrease by 2.0 (7.0 -> 5.0).
Your EV would remain unchanged.
This is really useful.
Weapons don’t have it:
Base accuracy: +4 Base damage: 6 Base attack delay: 1.1
This weapon's minimum attack delay (0.5) is reached at skill level 12.
Your skill: 5.2; use (s) to set 12.0 as a target for Polearms.
At 100% training you would reach 12.0 in about 4.6 XLs.
At current training (50%) you reach 12.0 in about 6.0 XLs.
Current attack delay: 0.8.
Damage rating: 7 (Base 6 x 110% (Str) x 114% (Skill)).
Like would this spear make my accuracy go up? down? need more training? have more attack delay? less damage?
There’s more reasons you would want that for armour than weapons. Armour effects AC/EV/Spell failure which before was very to compare without actually trying it on because all of those things are complex, effected by your stats and skills. (and of course with Ash you often can’t just try it on)
As it is, you can already easily compare the DR/accuracy of weapons without trying it on. Unarmed is perhaps the only exception.
(An aside: I don’t care much about accuracy when comparing weapons. Generally higher tier weapons will do more damage, the accuracy bonus/malus isn’t enough to change my decision. Slaying, which boosts accuracy and damage could of course)
So I think there it is. It’s just not as useful and would further clutter those display menus. Maybe it will happen some day but it won’t make a huge difference if it does or not.
Armour effects AC/EV/Spell failure which before was very to compare without actually trying it on because all of those things are complex, effected by your stats and skills.
This is also true of weapons. Consider an artifact with lower base damage but + STR: how would a player know if it’s an upgrade/downgrade without spoilery number-crunching?
This is (imo) why people so often hand-wave weapon accuracy - it’s a relatively small part of a much more complex calculation, and there is currently no in-game way to tell what impact it actually has. Being able to see “with this weapon your chance to hit [last monster] would change by +/- X %” would make reasoning about accuracy a much less spoilery experience.