So. MQM formed in 1980s. WE are in 2018. Parties are devastatingly centred around ethnic groups. You can split and dice this way you want but that is fact.
There is difference between ethnic parties like ANP, MQM etc and mainstream parties like PPP, N and PTI. Former never won outside their ethnic strong hold. Though I don't see how PTI or for that matter any other party will compete with PPP in interior Sindh. But punjab always was open battlefield.