One thing I liked to see is the ability to dye shields and possibly weapons. Shields are considered armor and should be dye-able.
I would also like to see what color a dyed piece of armor is when I hover over it.
Sometimes I find a color I really like when selecting randomize and selecting it replaces it with a previous color I used. This makes it real troublesome to find out which color was used.
Zavus - Khajiit Nightblade EP | AR 50
Zāv - Imperial Templar | AR 24
Zavbags - Argonian Nightblade EP | AR 19
Zabus - Redguard Nightblade DC | AR 13
Negate Three - Breton Sorcerer EP | AR 19