Ive been playing this game since day one, and I love it, but there are some quality of life issues that could really use addressing.
Firstly the footsteps counter is incredibly broken, a lot of the time it only records 1/3 of the steps you take. Rather than fix it I think a much better approach would be to get rid of it entirely. Eggs would be much more efficient if they ran off of a timer. Personally I barely even bother with them now because I (and most of the people I play with) play from inside a car, there are few reasons to actually walk around. I would be much more inclined to purchase incubators if eggs were easier to hatch. I mean this is a video game, why would you care about trying to make people more active? Money is your bottom line and I think this could definitely help.
Also after the update that requires a minimum speed to activate pokestops the Pokémon Go Plus is pretty much useless. I thought the whole reason for making it was for people to use when they cant use their hands or pay attention to a screen (i.e. Driving). I work at a toy store and because of this I have been unable to refined it to any of my customers.
Lastly this previous update has caused all Pokémon and sighting to randomly disappear from our screens for about 30 seconds at a time. It is a mild ignorance but it should be easy to fix!
If these issues were to be addressed then this would be a great game!