I have attended the FedEx Cup Championship at East Lake GC for two Sunday rounds. The event itself is always a spectacle and worth the trip. However, the grounds are not a beautiful as other PGA courses like TPC Sawgrass, The Ocean Course or Augusta National. In addition, outside of the club is very urban and in need of improvement.
If you go, take advantage of the shuttle from Turner Field and avoid parking in one of the shady pay lots outside of the club.