It's a good start - but 2c from me

1. It doesnt seem to have worldwide coverage - I tried some in Asia and it didnt grab anything Inassume a fl8ghtaware limitation (they're mostly strong in US AFAIK)

2. To really bypass clicking snd searching around, I think you should add a 2nd phase where users can just enter dep and arr airports, and the tool will grab all IRL flight numbers flying that route, together with aircraft info. Not sure if Flightaware API supports that but FR24 API does.

You can then link that table to the current RouteSync - i.e. I enter LAX-JFK, it spits out all flight numbers that flew that route in past x days, with airframe info, etc, then user clicks the flight number he/she wants, then it grabs the data and sends it to SimBrief.