yeap, it's hard to recommend this app to friends if the map has not been updated. I can see many new users around me who joined for few days and never see them again. I believe waze is working hard on this issue. Don't lose heart
Yeah - 2 months here - and some others have put in much more than me. I doubt that anything will be overwritten as such - it is more likely to be a validation and correction of whatever is there and then filling in (hopefully most of) the blanks. My understanding is that nothing will be changed unless it is obviously wrong and that new roads will appear dotted for validation.
I might misunderstand your question, but you do know that you can edit the maps of the UK yourself, right? You are able to edit the areas about a mile (I believe) away from where you drove, or if you want more access, you can request to become an area manager by sending an email to email@example.com.
Area Manager Oahu, HI | BMW X5 Driver | Samsung Galaxy S / Android 188.8.131.52 / Waze Beta 184.108.40.206 User Join the waze_Hawaii group and follow @waze_Hawaii on Twitter!