[techhelpbb]

If you have problems troubleshooting one system.
So you create a second system with all the same constraints.

Now you potentially have two systems you have problems troubleshooting.

So far as I know FIRST has a backup WiFi system at the events. They can offer you a different set of D-Link APs that they have tested as more 'robust' against intereference.

I can only presume, as I can't recall hearing they were deployed, that they haven't seen a reason to use that hardware.