Just tried playing with Google's route planning as it is in my car now.I see the predicted charging times more of an indication about the planned route, similar to the predicted driving time to the next stop.
When you are charging while routing is active, arrival SoC for the next target is updated in real time. You could simply stop charging when arrival SoC is predicted @ 10%.
I have yet to test the new system on a longer trip. Am also curious how they will implement editing the charge points and preferences for/against certain charger networks.
It does suggest >50kW chargers now - yay!
But, it only indicates the %SOC you're meant to have when arriving at each charger and the time you're meant to charge there.
I see no way to know what %SOC you're meant to get to at each charging stop - that's a dumb oversight given the variability of effective average kW and if you have to do multiple stops along the way, it's a faff to have to titrate to some threshold at the destination and guesstimate yourself. I much prefer ABRP's display that shows the expected %SOC at the beginning and end of each charging session. I see no rationale for not including that info given they easily have the pixel space to fit in e.g. "25%-->50%" for each charge listing.
Also I see no way to nudge the suggested charging route by ignoring or specifying a specific charger, filtering by kW or charging vendor, filtering by nearby food/rest options, or anything like that. Google just gives a suggested route and if you don't like it you have to just deal, or hack it by giving intermediate destinations to force it to do what you want. I know they must be working on it but right now planning with ABRP and checking chargers in PlugShare or the analogue is still the better option.