UA said if I kept the ET flights and missed the ADD-WDH flight it would be on me to figure out how to get there. I went ahead and totally changed my flights to WDH. I couldn't chance missing the ADD-WDH flight. My new routing is UA 5372 MCI-IAH, UA 46 IAH-FRA, LH 570 FRA-WDH. That's all that was available from UA J class awards. The ET flight from IAD had no award space. This routing saves me having to spend the night in Chicago before the ET ORD-ADD flight buy has a very long 9 hour layover in Frankfurt. We arrive into Windhoek at 8;20am vs 1:30pm, the old time.
I am still flying ET coming home unless that flight itinerary has a schedule change.