This is a screenshot form my PC, so I do not expect it to be quite the same on my phone
Did you try? On my phone, I get this with the Google maps app, which is quite the same:
You can select one of the routes by tapping the estimated time labels.
Right now (Wednesday, 8am) there's slow traffic near the airport, but it still takes 30min for 30km, which is not that bad. Google also does not suggest an alternative around that little jam.
The only advantage of the desktop version is that you can give a time, an it it shows how long the trip should have been when in the past, or a prediction when in the future, calculated from collected traffic information. I didn't find that in the app.
Your third route was done by dragging the generated route by mouse, i.e. adding intermediate stops. The app provides this function, too. You can't drag the route, you have to add a stop and can select it from the map.
My personal experience is that Google route planning is really good since it knows the traffic status much more precisely than any other device or service, due to the information it gets from all the Android phones on the streets.
(not really an answer, but the Screenshot doesn't fit into a comment)