Hi,
A solution to address all the above problems is to make WiFi module to work with the SpectrumPhy instead of the YansWifiPhy.
Then you can see both inter-channel interference, lr-wpan/Wifi interference, LTE/WiFi interference...
It will require quite a lot of restructuring in the WiFi code, but if you are up to it, then your contribution will be most welcome.
I would advise you, to move further discussions in the developers mailing list.
Regards,
K.