In New York, the situation is fairly dire. Before, subway stops showed up on the map with the names of the subway lines so you could see that the nearest stop to you was an "R" or a "4/6" or whatever; now that information does not appear on the map at all.
If you use the map and ask for transit directions, that used to just work. Now you get presented with a list of apps it can launch for this purpose, but some of them are terrible and the ratings don't reflect this - you just have to try them at random and see. For instance, there's an app called "Transit" which tells you which stations you want to go between but it doesn't give the names of the subway lines so you don't know which platform to stand on to get the right train. Meanwhile, one of the very best apps for doing New York subway navigation and planning - KICKMap - doesn't even show up as one of the available options from Maps.