It is a good place to be, as has already been said semaphore road is good and lively, there are also a few shops and a cafe/restaurant on jetty road at largs bay which is good, we have 3 children at Le Fevre and they are all doing really well.
Also the old police academy site on Strathfield terrace is going to be redeveloped so that can only be good for the area.
On the asthma thing, 2 of our children had mild asthma in the uk, but since being here one no longer needs to carry an inhaler and the other although keeps it on her hasn't used it for a couple of years.