The build still works the same in patch 7 yes
The point of raging (with that build) is if you want to hit two targets with one swing or just want a bleed on them so your other party members can attack with advantage... Having heavy armour doesn't stop you raging it just means one effect isn't applied
It's a good build for karlach but I like a character with face skills for my tav
Each to their own of course
