You can discuss new features you'd like to see on waze in this forum, and also put them up on waze.uservoice.com so other users can vote and we can see the trends and what most users would like to see from waze.
We have two separate forums:
One for suggestions on the editor and the website in general - here
The second for suggestions on the application (client) on your phone - here
No need to sign in on uservoice, unless you want to be notified when you ideas are changed / accepted etc. Thanks!