The problems are there are so many and new ones listing so often. It is easy to find the big ones eg yobit,bitfinex but etherdelta was new to me until a few weeks ago. Someone would have to list them all and monitor new ones and delist redundant exchanges. Time-consuming if non-paying.
Yea, thats what Im looking, maybe its not very useful for individuals, but it very useful for business. Whos going to offer a product for them (like we are going to do). It hart to monitor all of them, especially on local markets..