Hi Terre,
This has been passed around but we would be concerned about two items.
1.) The 30 second download means an aircraft could easily be in totally the wrong place (approach, takeoff) if using the last data and then moving back with the next update wouldn't look good.
2.) This would be more proccessor intensive.
We may in the future decrease the download time to 15 seconds and have an option of allowing simulated network data.