Hey.
I think the most crucial feature missing right now, would be an option to show a despawn count down timer over each Pokemon on the map.
This is especially important when one does e.g. shiny hunting tours per bike, where one wants to click as many Pokemon as possible and thus needs to find a good order in which to check the ones on the map.
Clicking on each of them and looking up the countdown in the balloon info, just doesn't scale.
Thanks & cheers!