I see no evidence of the trees taking over any areas where I live (so. coastal Ga.)or travel--only a tree here and there occasionally. I don't understand the fuss. We had a gorgeous tree which was lost to the fugal disease, and the couple of progeny that resulted soon died too. The few other trees in our neighborhood have also died over the last 10 or so years. There a none left. In no. Ga. mountains where we have property we managed to find a couple of root sprouts to transplant and are waiting to see if they lived through the winter. There is only one other mimosa within a mile of that location. It is so popular with butterflies during the summer that I feel like it's an important food source for them.
I love this tree. I grew one in the back yard in Petaluma,CA (Northern CA) and its still growing strong & beautiful. I moved and now in Novato,CA and plan to put one in my front yard. It's VERY easy to take care of.