I haven't heard anything about changes to the 5k. This has been for two years running the best event Daybreak has put on and thousands has gone to Huntsman Cancer Institute. I was involved in the event in the past, but not this year. It looks to me as if the park party is "after" the event, not replacing it. Here is the announcement for the event:

3rd Annual 5k Dusk Fun/Run/Walk Park Party - Saturday, August 30 at 6:00 p.m.
We’re doing something a little different this year! It’s still a Fun/Run/Walk 5k but once the race is over we are having a park party! Currently we are looking for a great deal of residents to assist the Program Committee the day of the event. If you are interested, please contact Tina at tesparza@ccmcnet.com as soon as possible! This is an amazing opportunity for you to Join us for our “dusk” 5k fun run/walk. This event is open to runners, joggers and walkers throughout the Valley. The course will take participants through the beautiful neighborhood of Daybreak. We will conclude the event with a Park Party in one of Daybreak’s newest parks in Eastlake Village. The park party will offer live entertainment, BBQ dinner, clowns, face painting, bounce houses and raffle prizes for everyone. To register log onto www.sportsnuts.com.