In real life, airlines are very well aware of the seat configurations of their competitors.
You can currently look at a competitors fleet, down to the individual aircraft information but it doesn't tell you what the configuration/capacity is. It would be quite useful to know what configuration is being used and whether it's high density etc.
For example, I have a route where I have 1 competitor using a daily B727-200. Looking at the capacity offered on that particular route, I have calculated that my competitor is only offering 80 seats on this route with a B727-200 and would therefore be very interested to see what configuration is being used for that flight.
Is this possible at all or something that you could consider developing?