-
Most mount-speed-increasing trinkets (Carrot on a Stick, Skybreaker Whip, Riding Crop) have been changed to enchantments, which can be permanently applied to a single mount in your inventory and cause it to become soulbound. Furthermore, Charm of Swift Flight (which will stay a trinket) now also reduces the mana cost of Flight Form and Swift Flight Form by 115 mana, and Carrot on a Stick is now craftable (1x Simple Wood, 1x Fine Thread, 1x Golden Sansam). I imagine it would be an engineering recipe.
This seems like a good change for the most part, since we won't have to use add-ons to swap in our riding speed trinket all the time (and we'll save an inventory space). However, it does have the major drawback that you'll need to get a new one for each of your mounts, which could get expensive if you're a mount collector. More business for the leatherworkers, I suppose.
- Continuing on the mount theme, a sort of horned Swift Zebra mount appears to have been added to the game, as well as a Headless Horseman's Mount (both pictured).
- Aspect of the Viper has been buffed. Previously, it generated mana equal to up to 55% of the hunter's Intellect every five seconds; now, it generates up to 55% of the hunter's Int plus 35% of his or her level. This means a boost of up to 24.5 mp5 at level 70.
Update: I just signed on to the PTR, and was unable to verify the change to Riding Crop. So this might well not end up happening after all.
A few days ago, Eliah mentioned a tragic thing in his 
Subscribe
