Cyclone Debbie is no bigger than any other large cyclone that has hit Australia in the last 200+ years of recorded Australian weather events.
In fact, if early weather recording equipment was more accurate, more widely positioned, and logged more comprehensively, I would hazard a WAG that some of the cyclones in the mid-to-late 1800's were considerably stronger and larger than any recorded in the 20th or 21st century - judging by the destruction caused by those cyclones in the 1800's.
Overall, the last 2 or 3 years has been a relatively quiet cyclone period for Australia. In Western Australia, we are approaching the end of the cyclone season and nary a cyclone of any note has been recorded for this whole "wet season".
This is quite unusual - usually a minimum of a couple of cyclones hit W.A., each wet season.
Yet, surprisingly, this wet season is promising to be one of the best for 20 or 25 years across the NT and the top half of W.A.
There has been a substantial increase in rainfall recorded all across these areas, but this has been largely the result of simple, large monsoonal lows, that have carried vast amounts of moisture into these areas, from the seas to the N of Australia.
I trust the destruction from Debbie isn't too bad, but a very large number of important vegetable crops in Nth QLD look to be in the firing line.