Cheapest route or total charging cost.

Apps like Chargeway have really good real-time pricing information; while I care about arriving quickly, I really only use ABRP for longer trips and then coupled with Chargeway along the route to figure out where I should stop along the overall route based on price per kilowatt hour. For example, I'll choose an overall route with ABRP, and then use Chargeway along that route to figure out where charging is going to be substantially cheaper. It doesn't change the overall route at all, but it will save me $50-$100 over a road trip. That adds up.

Level 3 prices vary wildly from $0.30-$0.70/kWh, with some places exceeding $1/kWh. I would also like to see features like: if you leave 30 minutes later than you suggest you'll be able to save $15 in charging costs or save 20 minutes in traffic.

If ABRP let me prioritize stops based on cheapness of Level 3 charging, I would replace virtually every other EV app with it. Something like 2h15 minutes ($35 in charging cost), 2h45 minutes ($15 charging cost).