Whilst I agree the aft suites are preferable to the midships ones the aft ones have their issues. We're recently back from a 12 night on Ventura, which has the same suite layout as Azura, in aft suite C749. There is a space between this suite and C748 which is filled with an extractor fan from which there is a constant hum, not enough to stop you sleeping but you can hear it all the time in the cabin.
The issue is with the noise you can hear when sitting on the balcony and the regular food smells that come from it, not exactly what you want when trying to relax. It was on constantly except for 15 minutes. Similar located balcony and suite cabins on decks B and A also have fan grills between them so could well have the same issues?