I think Tirop is ready to breakout and put her foot down on the 5000m. She has the class, speed and strength. The only problem is that she is still very, very young. At 22, that mental maturity isn't there yet. But today she didn't panic in the last 300m. She let the other runner kick, and sat for awhile, but then made her big move with a 100 to go.
Obiri looked terrible, maybe that little layoff put some rust on those legs.
Bad thing about Obiri is that she is a specialist. She does not want to move up to 10000m, because she does not want to run the distance ( so no half marathons or marathons either), and she does not have the speed for 1500m. So 3000m-5000m is where she is at her best, but with Muir, Hassan, Dibaba, Tirop, and Shelby all running great this year, next year's WC is going be extremely tough for her to repeat as champion.
NOP has turned Hassan and Yomif into beasts. They were already great, but god damn they are just ferocious now.