I understand real estate on the screen is at a premium but it would be nice to see a live overview of where you are on a route. Even as a swiped feature?

This has been suggested many time, please make sure you vote up the existing suggestions so Zwift knows what the users want.

ZwiftGPS ( you can look at also.

Paul how do i find similar requests?

You can use the search at the top of the page: 

Here is a search for Map: