I feel that pain. I live on a side street right off a very busy road. EVERY time, it suggests that I make a death-defying left turn, even though I could go one street over and turn with a stoplight.
Sometimes I do choose to make that left turn myself, though. In light traffic (middle of the night, etc.), it's easy and it's faster. In heavy traffic, it can be impossible.
If only they had access to traffic data, and if only they had people skilled in algorithms and AI, they could use those two things to figure out when to suggest (unprotected) left turns and when not to. Oh wait... they do have that data and that expertise.
I was driving the other day and pondered whether measuring pulse/blood pressure/other factors that indicate stress while traveling a recommended route (or even passively, correlating to time+day) could positively inform route quality.
(*It honestly seems to prefer them, even in Seattle where everything is a reflective sheet of glass and pedestrians are shrouded in urban camouflage 300 days of the year.)