I'm a chronic reforger. I've spent many a lonely night at Godan's Runeworks in Orgrimmar, turning crit into hit and haste into mastery. The reforging interface on live is a boring brown and black box, with pulldown menus to help you choose the stats you want to reforge to. While the reforging interface served its purpose well, Blizzard has made some excellent changes to it for 4.3 to make it significantly more user-friendly.
Whereas on live, you use a pull-down box to choose the stat you wanted to reforge from and then another pull-down box to choose what you want to reforge into, the PTR reforger has all your options presented in the same frame, making reforging faster and easier. It also is now a shiny purple color, much preferable to the drab darkness of the live version. It now features a reminder on your reforged items that you'll need to undo the stat change to reforge again, which is helpful for the airhead in me who sometimes accidentally restores the wrong item.
Brace yourselves for what could be some of most exciting updates to the game recently with patch 4.3. Review the official patch notes, and then dig into what's ahead: new item storage options, cross-realm raiding, cosmetic armor skinning and your chance to battle the mighty Deathwing -- from astride his back!