I have no idea how to switch between satellite and map view. I have no idea where to look for that option - or if that option exists. There's a burger menu, so I tap that. There's a list of options. Satellite is in that list, and is highlighted. The option I want, and I don't know what it's called, doesn't appear to be in that list of menu items. I tap the map to collapse the burger menu. I hold the screen then release. A pin is dropped. I don't think I want a pin, but I have no idea how I dismiss the pin. When the pin is placed a small thing pops up at the bottom of the window. None of that looks relevant. I, completely accidentally, pull it, and a bit more appears. None of that is relevant either (but now I've accidentally discovered how to get street view). I pull it again because something happened the first time and yet more stuff appears, but nothing relevant. I realise that it can't be this hard, so I go back to the burger menu and unintuitively click "satellite". I don't want satellite, and this menu item is already highlighted, and it never occurs to me that someone would put a toggleable item in a list of menu entries without any indication that it's a toggle. But bamn there it is.
So, how would I change Maps? Just put a few more affordances in there. Maybe watch how people unfamiliar with the app try to do stuff.
There are lots of things I like about maps. There's some churn in businesses on my street and maps always seems happy to change info.
In the past there was a ton of research into user interaction with UI. Obviously loads of that fails on mobile, but Google is a smart data driven company that could create a new body of work for mobile.