Well, Putting a point in Divinity over filling out Imp Dev Aura is clearly an error: you're giving up extra armor and +2% healing for the entire raid (including you) for +1% healing on you only.
Based on current numbers, 5/5 conviction beats out 5/5 SotP for threat both now and in 3.2, so you should move those points as well resulting in the following:
http://www.wowhead.com/?talent#sZy0xA0ugGsIuczxf0xFrom there, it's at least worth considering moving 2 points from Conviction to Pursuit of Justice. Most Tankadins also consider 1/2 SA to be adequate for our mana needs, giving you another talent point to play around with if you choose.