It's good for non-combat builds with low EN. It's mostly for defense, you can't shoot while running.So I don't think it's a problem that it doesn't cost you caps. It's not like you can dosome harm with AC alone to anyone. To attack you have to stop and you lose all AC.
lol?With armor more AC?That doesn't make any sense..With heavy armor you shouldn't able to dodge better than without armor.