Its an decent chance they will let us use other armor weights for style change, they wanted to make system flexible they said so probably more options than you get then crafting.
Its an option to run one light with medium armor. With the undaunted passives this even increase all your resources a bit.
Downside is a bit reduced regen and lower protection because of light rather than medium.
I tend to run heavy chest and the daeric light armor skirt on stamina build I level, will probably keep it later.