kingofbigwheels

I have the pineapple working fine on Kali. I did notice if I buzzed through the wp4.sh script and took the default gateway it offered (172.16.42.1) and didn't change it to the correct default gateway, it looked like the symptoms you mentioned (all traffic heads out eth0 because the pineapple is now the DG). Check your route table as well as ifconfig settings.