Getting through the encryption is easy, just sneak into the event Wednesday night and grab your WPA key from FMS
I wish it could be used at events however, like you said, teams are not given the encryption key. I imagine the use case for this to be when teams are testing out their robot at home and want to get a view of what is going on on the network, or troubleshoot it if there is an issue. Another use for this (even though currently it only shows one robot at a time) would be a field monitor for offseasons that do not have an FTA. I think though, that it may be better to make a separate app for monitoring the entire field for offseasons than using this for it, but I'll see how much free time I have
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Oliver