I think its not bad at all, they also come an bring some new packags n so the Competency in Mkt so at the ennd it bring the benefit fir users fir other operators also.
They r expanding the network so soon thy will become also key player of Mkt.
Warid has stopped investment but again have started n announced Thousands of new sites. Mobilink is old so many prefer Mobilink n also calling others as most of the Business realted peoples uses Mobilink so its cheap. Although not cheap as compared to U-fone.
Zong is a baby operator right now, let it groom and feedback them ur problems thy will look into ur problem as i know there RNP is working.