"Nobody should be one-shotting at any battleground level, so yes that (and many other class abilities) will be addressed." - Kalgan
"there are a number of issues like that for when abilities are given for classes, mostly in relation to running dungeons early on, and then quite a few for PvP twinking and keeping those brackets balanced a bit better. They're legit issues and we hope to be able to spend some time going over ability pacing again." - Bashiok
"We care without boundaries. We care so much for people playing through the lower levels, we remade Azeroth anew in Cataclysm. And that wasn't all we did to improve the experience for lower level players." - Wryxian
"at low levels, no one cares" - Forum user, "We do, actually." - Kalgan
"We understand this may have some impact on [low level] PvP healing and do want to look over balance at those lower levels at some point in the future." - Lylirra
"We do care about and actively balance at lower levels. Our goal is to make the game as fun and balanced at possible at all levels" - Zarhym
"Now with patch 3.2, we're technically supporting twinking" - Zarhym
Twinking recognised as a legit PvP endeavour by Vaneras - http://blue.mmo-champion.com/topic/19527/twink-info-for-dummies
As you can see Blizzard has stated numerous times that low levels are a commitment to them. It is well past the time for Blizzard to stop talking and either provide balance or at least have the common decency to tell us that low levels are not a part of their game plan.
Should Low Levels be a Priority?
You may argue that low levels aren't a priority, but I would argue differently
Endgame is in a stable state at the moment (a patch has recently come out) and is definitely balanced enough to be enjoyed by the majority of players. Low level pvp is enjoyed by a substantial proportion of the player base (many more than I suspect you would think and not just twinks) and is very very imbalanced. The immediate and urgent nature of the low level imbalance coupled with the extent to which it is imbalanced make this a higher priority than endgame pvp balance, in my mind at least. I am not suggesting that endgame be put on a back burner, but it is safe enough at the moment for some of it's resources to be pulled off it and utilised to save low game pvp.
"It's easy to moan about low level PVP balance but harder to come up with a realistic fix."
Yes balancing is a major commitment, however the twinkinfo.com community has come up with an extensive list of solutions to fix low level pvp that fill every criteria, does not affect endgame and has only beneficial effects on low level pve.
It is not as hard as it may seem. Admittedly the TI solution is merely the first iteration of the balancing process, but it is a very solid frame work for the devs to start from, much more solid than the current "balancing". The devs are very aware of it (I received a personal email from Bashiok recognising it), but for whatever reason balances for low levels have yet to be implemented.
Kore nametooshort - twinkinfo.com