Supercell, please allow the air bombs and air mines to work against healers. Maybe reconsider returning the heal strength back to the healers if you go through with this if you're worried about over-nerfing.
Edit: Avicularia brought up a good point that air mines would be too strong and a hard counter against AQ walk and I think he's right. Seeking air mines would destroy the AQ walk but please allow the skeleton traps and the (aoe) air bombs to work to at least chip away at the healers but not one-shot them.
People have the assumption that I am against the AQ walk. I use it myself and I have a lot of 3-star success with it in clan wars against mid to high TH9s when I couple it with govaho or other strats. I have a level 19 AQ in TH9.
When it comes to farming, I find that AQ walk is too easy to learn for its high reward and it only gets easier the higher level the queen gets.

