Ill try to explain it by steps:

1. Entered my destination and started on navigating.

2. I know that the ETA is not accurate as there is a high probability to be delayed!

This very important information isn't written anywhere, so i have to take it into account.

1. I'm taking the same route every morning, having me adding about 30 mins to the ETA that WAZE shows.

2. Can I have WAZE presenting the probability (percentage) of delays and how long it will be?
   This information can be calculated based on historical data, live data and reappearance (which is everyday).

3. Please don't show me an ETA of 1hr while I an being delayed every time in about 20-30 mins.

4. Ill be happy to explain more.

Keep up the 99% good work :)