Kill XP Rested Bonus: Reduced from a 100% bonus down to a 50% bonus when killing creatures with rested XP.
Tents Capped: A player's tent-based rested XP bonus is now capped at 25%; tents provide no additional benefit if you already have more than 25% rested XP.
Inns Buffed: All taverns located outside of major capital cities can now raise a player's rested XP up to 100%.
City Taverns Unchanged: Taverns inside major capital cities keep their original mechanics (up to 150% max rested).
Pace Equalization: Taverns and tents now grant the rested XP bonus at the same speed. [1, 2]
Now i know there was some xp changes in octowow as well. Could any1 please write them so its very clear whats going on?
I heard xp from mobs are 75% here instead of 50%. 
I found now from the octowow patchnotes this:
Tents now give up to 33% of a levels worth of rested exp (turtle's was only 25% so we bumped is slightly). We also increased the rate that it gives exp to so that it is significantly faster than sitting in an inn for the same amount of rested exp. We intent players to use tents (crafted by themselves typically) as a hold over when they need another 1/3 or less of a level to ding and go back to a town/inn for a full rested bar. It takes 3 minutes to get from 0% rested to 33% rested with tents.
The inns now give rested exp up to 150% max at a slower rate then the tents. It takes 12.5 minutes to get to full rested from 0 with an inn.