Perhaps I am just not just familiar with "dump" cakes, but this for me was a crustless pumpkin pie with a streusel top. It was easy to make and it is not too sweet. There is just no cakeyness to it.
My son liked it, but wanted it with crust. I don't really love crust so, it may be preferable to me. My only problem really is that I did want a cake today, and I got a pie.
It was certainly easy and the taste was really good, but I was expecting it to be a little taller (it felt very "flat"). We preferred it the next day, after storing it in the refrigerator as the pumpkin part had firmed up and texture was better.
So yummy and decadent! Would definitely make again—the perfect dessert to bring to your next fall get-together.