I know there are SO many other first aid achievements in the game with MoP but did you just forget this one? then again we only have had what fish up 1,000 fish for 5 year's with nothing new so I'm not sure on this on.
Might actually put some value on windwool again for a little while as people buy up all the stacks for 15-25g to work on the achievement.
They could have so many first aid achviements. Like heal 50 players who are before 50% or heal someone less then 5%