I decided to trial this spec and so far I've come up with a few opinions.
1) It's a pretty good pvp spec if you still wanted to tank. Granted that full columi gear and good heals/skill will carry a sizable portion of you through the more difficult FP's/Ops.
2) Makes a great OT. Bad rng of any kind as well as lag will cause **** to hit the fan but constantly inter-charging should help with reducing threat and damage and if things do go south, this spec would do a little better at holding the boss at bay until the MT can be battle rezzed.
3) I am still trialling the spec but without the constant inter-charging with perhaps even a saber throw, rage would still be an issue unless you throw in our base attack in there. I mean I can't imagine generating 8 rage every 9 seconds to combo impale with force scream when enrage or choke (which has to be channelled) are on CD. That is on tank and spank fights.
To sum up, it is exactly what I thought the venge spec was, a dps tree with pvp in mind. Or a dps that won't get one shotted by cleaves or aoe. Put on some tank gear, use the hybrid spec and as I said earlier, makes a great OT but as an MT, I do lean towards the end game content being easy to let that slide.