The coins they would make if they allowed us to buy candy at a somewhat reasonable rate (like 10-$1, so 50 candies the equivalent of $5). That and improving the footstep radar so that it actually updates when you're close

I had to give up on a growlithe and wartortle yesterday because I was just going around in circles killing my battery and even when they were first place on the list, it still showed everything 3 steps away. But of course improving the servers should be the #1 priority