So I finally managed to finish getting all of the current Pandaria faction reps to Exalted on my main this past week as I finished out the August Celestials faction. Just in time for a brand new faction to drop today with Patch 5.1. Woo hoo!
Overall, the process took me just a little under two months. That doesn't include doing dailies every day, but probably on average around 4-5 days per week.
I've now started the process anew on another toon - my shadow priest. So I'm looking forward to the reputation bonus that I'll get from already being at revered with every faction on another toon.
For the shadow priest, I'm just going to be doing the four factions that are directly relevant to valor point gear - Golden Lotus, Klaxxi, Shado-Pan and August Celestials. I'm already almost to revered with Klaxxi and just hit Honored with Golden Lotus.
I've also been working on leveling the paladin and he's about half way to 89 working his way through Townlong Steppes. I gave up on leveling as holy at about level 87 as it just wasn't scaling very well. Mobs were taking way too long to die, especially compared to how quickly I can mow things down as ret.
As an altoholic, patch 5.1 contains quite a few things of interest. The main thing for me is going to be the rep bonuses given that I already have all factions at revered or better on my main. I'm also looking forward to the new faction and new content in Krasarang. Finally, the new questline for warlocks and three new scenarios are all positives for me.
I still haven't touched pet battles at all, so the changes there aren't going to impact me, at least for now.