It would help others to evaluate your testing if you posted the chars involved and state the main class of the testers.
No offense, but I find it hard to believe that one can use multiple chars ("tested extensively wd vs. barb", "tested natalya's soul and wrath") to their fullest potential.
Also you are changing a lot more than just "no wotb, no hex" in that match-up. Most barbs as well as WDs agree that this will lead to more fun duels because playing with a 2min CD that gives you a 15s window to kill your opponent is stupid.
While testing this, it looks like you found out that it's too hard for WDs to take down a high HP barb with tons of regen and relentless. This is probably true, but I really don't get your solution for it:
No spirit vessel for WD means no second life and about 15% higher cooldowns on spirit walk and horrify. Also no shield, but you can't afford to use a shield anyway vs. barbs because you will lack dps.
Barbs will just say fuck regen (inspiring presence), stack enough dps to 1-2 shot and go for a quick kill with HotA. They don't even have to be careful about when to engage anymore because there is no Hex. All WD can do is spirit walk and fear once (maybe stun once with a 60s cooldown) and then pray that the barb won't come near them for the next 12s.
So if you felt that in "no hex, no wotb" barbs are a little superior, the additional rules certainly widen the gap. My suggestion would be that you test changes similar to "barb vs. wiz", i.e. reduce the mobility of barbs a bit. From a barbs point of view with sprint marathon and charge it almost looks like WDs are moving in slow motion.