Well, I am at 64 and only one have I actively gone after using the map, a Kadabra that appeared near my house (which normally has nothing but Weedles and Pidgeys). And I would've gone for the Wartortle if not in working hours.
You have 30 types, but if it ever came down to that one last one that you needed, and the 3-step system was still broken, bearing in mind that's the intended method of playing the game, you wouldn't do anything about it? Not sure how you can consider a tool that uses Niantic's publicly available API to map pokemon to be cheating, although I consider it against the spirit of the game - if it was working properly.