1) Absolutely false. BnT is more effective at keeping up Rend than Rend is.
2) This one is up to preference. Drop it if you want to pick up Cruelty and Deep Wounds.
3) Low chance to heal a tiny bit of health. Might help out in heroics, not so great in raids.
If you dropped Craze, TS and Heroic Throw you could go get DW and fill out War Academy. It's what I did. Gag Order is not great for raiding either.