Griffin armor would be better to be designed as some mail armor instead of breastplate... Breastplate would suits more to heavy armor than medium type. Cat armor looks like combination of mail and quilted linen, which is OK for light armor (even though it would be hardly light, but definitely more flexible)
Nilfgardian DLC set looks like true light armor, made just of leather, yet its real protective ability would be quite low, as leather, especially that nice shiny one, had to be softened, and softness is the least preferable thing about an armor...
but i guess these things will be easy to fix by community, once RedKit is out...