I have noticed from other instances that the range mobs will follow you seems smaller than before. It's just an impression -- not verified or anything. If you don't dismount and consecrate once in a while you'll lose them even earlier. "Keep them angry."

However, the biggest problem I remember about ZF boosting with a pally is:
- Pally wants/needs to make large pulls to be effective.
- In ZF every other mobs will drop healing totems.
- Pally's damage is too low to overcompensate that healing and will eventually go oom.
- You die.

So I boosted through ZF with my hunter. That was much better.

Have you thought of trying Maraudon instead? (Haven't tried myself, but in the same level range)

Cheers!