When WN previously flew out of IAH and HOU they didn't do the co-domicile so it's unlikely they will do so now. Additionally when OAK opened in 1995 they made a SL to the 1994 CBA that allowed a co-domicile of OAK, SJC, and SFO, they was even a chart showing the TFP between cities if you ended you pairing at a city other than the city you started in. WN never used that provision either. Co-domiciles are a concept that WN Management doesn't understand.