First, When you geared your pally, were other players gearing theres? You're probably running heroics with players with far higher gear level now. That's going to be part of it. Your in 333s so even your vengence won't be stacking as high as it will in a little bit. That doesn't help either.
If you're just running heroics for now, take a point out of Vig and put it in cruelty. How often do you use charge/heroic leap? If you're #1 issue is threat, not mobility, drop warbringer until you gear up and place it in cruelty for 2/2.
What's your rotation?
SS with Heavy Repercussions > Con Blow > Shockwave > SS generally speaking. So if those are up, make sure you're hitting them.
Are you using HS enough?