inSSIDer is very basic and is only really aimed at spectrum occupation.
If you really want to know whats going on in your network then you need to also start looking at packets etc.
For this type of analysis I would recommend using 7Signal, which varies from the low end Micro eye, which is essentially a Raspberry-Pi with a wireless USB dongle:
http://7signal.com/products/micro-eye/micro-eye-data-sheet/to the more sophisticated Sapphire Eye, which supports 802.11ac:
http://7signal.com/products/sapphire-eye/You could obviously use other tools for network analysis, but this is easily the best that I have ever had the fortune of using.