According to a tweet from Atlasloot and a Wowhead comment, there may be a chance that players will be able to loot the old and original bot pet from 2007, the Clockwork Rocket Bot, from this year's daily reward, the Stolen Present. Currently no one's sure if this is a bug or if this is an intended drop (along with Lumpy), so we'll have to wait and see how things play out. I'm curious to find out if the Clockwork Rocket Bot is still BoP or BoE if looted from the Stolen Present!
Edit: Atlasloot says it's still BoP even if looted from the Stolen Present. Sadness. :( Guess that means I'll be destroying bots on the toons that already have it. Poor pets... I delete you with love, promise!
Update: Wowhead comments are reporting that the Greench now has 3.4m hp, and the quest objectives can be completed even if you're not part of the kill. The Stolen Treats can be looted and Metzen can be freed by anyone for a few minutes after the Greench dies. So it would seem that the mob is not instanced and is more like a world "boss" now, but the quest objectives aren't exclusive to the party that kills him. *sigh of relief*