Epoxy? Before the laminate?Don't get more carpet. Do a quality laminate and installation with attention to detail. No need to analyze rugs. You can have carpet companies make any piece into a rug. If you're on a slab and you don't like some of your other flooring I would consider pouring epoxy on the whole thing and getting some nice carpet rugs made.
@Ready_fire_aim
I used to to be in that business. Out of practice now but I wouldnt play around with carpet or anything on top of a slab. Pour that epoxy and do a carpet rug with pad. Thats legit.