Totally down with the sickness. Seems best viewed at a workstation as a webpage, there's so much data that the iphone 3G can't keep up and regen time is loooong.
Yes, this is a challenging area. It is the waypoints that really slow it down. Try disabling the waypoints under "Event Layers" and see if that helps.
For racers, you will definitely want to go to Options and set "Network Resources" to "disabled". This disables Facebook, Google maps, auto spot updates, and sets the base layer to the tiles cached on your device. It is MUCH faster. You will still want to disable the waypoint layer too.
The jury is out as to how it will work with 80ish more waypoints - riders are generated the same way as the waypoints. I might do something about it before start time...