I am running 4 A3s (wired mesh) with 2 switches. One of the issues I ran into was solved both on the forums and via the support with the same recommendation that worked. I am just trying to make a point that the support network does work.
More importantly, what I would say is do not be afraid to start over. I did the entire network one time from scratch, and dropped and re-added the slave A3s a couple times. Since it is really a simple process, its really no big deal. And that is the biggest recommendation I can make- do not be afraid to start things over in part or completely.
All of that being said, I have fussed with Apple, Open Mesh, and a batch ddwrt routers and wasted countless hours with each of them trying to get things solid. I am finally happy thanks to the Almonds. Although everyone has different needs, I really encourage you to stick with it. It is such a relief to finally have a working and stable internet throughout the house.