If you have a look at Simon's player profile, you can see he had a really decent year before his injury. 2 Big Wins at Konopiste and Nick Hyde Memorial, nothing worse than 8th place. He could have been a real contender for the Worlds this year, because the Kansas courses suits perfectly his game. Could have suffered more from the heat though. If he gets fully fit again, he can become a real threat.
Eagle is on his way, just need a little bit more experience. If you have a look at his Worlds Vlog, you can see his father giving him a lesson about the way he behaved during a round getting too confident. He probably won't make that mistake again. If he can stop complaining about the baskets, he'll become better and better.
But, their main problem is consistency (just like Koling, Locastro,...), there are not always competing for 1st (McBeth and Ricky do).
But, then, the upcoming USDGC might be the most competitive one, with the amount of potential winners, coming from BOTH sides of the pond. I'm still putting a penny on Sexton for the USDGC, because he probably won't choke on the last round this time.