I play a really similar Barbarian, just opted for unlaboled blade instead of bittercut. I did take some "offensive" talents (bloodthirst e.g.) instead of threatening presence.
It is a really fun build which does quite some damage if the unlabored blade proccs while HoF - or just when Autoattacking.
I used a higher con though, but I can see that a lower Con works on this character as well.
unlabored blade is imho a great weapon for this build.
It also gives you 2 healing chain per rest which is complimenting your huge health regeneration with survival healing II/III and 25% healing from neck/belt ( i ran this as neck) and an dimensional shift which is totally awesome if you jump into enemy lines, use HoF and some enemies slip past you, you can then dimensional shift back and switch with your monk or another partymember if you need to. It's only 1 per rest, but it can certainly help for a messed up pull.