>>51126103I'd add a dens and watts system.
Turn unused Waypoints into dens where you can sometimes battle and catch wild Pokemon, earn watts in the process.
Spend watts to activate Go-Powers, things like hatching power, stardust power, candy power, XP power, etc.
Watts would also be earned through walking, and minimally by recycling items (instead of just trashing them).
Since it's Niantic, they'd probably put in something like "Batteries" which are used to store Go-Power charges. Batteries have finite uses, except for one infinite battery.
