Currently if you want the rewards for earning several battleground-related meta achievements, you have to gain several achievements that require you to win different battlegrounds with "perfect" scores.
These are the; Arathi Basin Perfection (Win a match of Arathi Basin with a score of 1600 to 0), The Perfect Storm (Win a match of Eye of the Storm with a score of 1500 to 0) and Battle for Gilneas Perfection (Win a match of Battle for Gilneas with a score of 1500 to 0).
I personally advocate that these achievements be either reworked or removed from the meta "Master of" achievements. In my opinion, these are badly designed achievements for a couple of different reasons. Those reasons are as follows. (Keep in mind that I have earned all of these achievements, please. I'm not unhappy that I can't get them, I just think they're bad achievements).
They're not practical to earn achievements in PuG groups, and you can not build a 'stomp' team to do it. When I got the Arathi Basin perfection achievement, it was because the game bugged and gave it to me when the enemy team had only a few points (most people I talk to or see commenting on this achievement earned it the same way- the game bugged). When I got the Eye of the Storm achievement, it was only because THE ENTIRE ENEMY TEAM WERE BOTS AND THEY WERE ALL BUGGED AND STOOD IN SPAWN THE WHOLE GAME. Which was amusing, at least.
Because there's no way to earn the achievement if the enemy team scores as many as 1 points (barring the game bugging out, of course), there's no legitimate way to get the achievement unless the enemy team is somehow severely undergeared. With the new Battleground Template system, however, this is never going to be the case again. These achievements now expect you to legitimately outplay an enemy team in a random PuG battleground. They are not achievements you can really "earn", so much as achievements you just happen to get if your team is that one in a million teams that manages to stomp in a stat-balanced battleground.
The methods of getting these achievements at the moment are either trying to queue with 4 friends and hoping you can make it work with a five-stack, trying to get the rest of your PuGs on board with tryharding the achievement or getting the achievement in an RBG stomp.
I simply do not believe these are valid or well-designed achievements. It takes two seconds to come up with a "beat the enemy without letting them get one point" achievement, and they're lazily designed.
I understand a lot of people here will take the opinion of "So what, they're hard because that's the point of an achievement", and that's fine or whatever. I just think from a more objective and design approach, they're badly made achievements. Discuss here.