Quagsire is "good" because its ability allows it to stop set up sweepers, Haze is good because it stops BP. And Quagsire takes up one of your 6 teamslots, Haze just one of 24 move slots and its not like Quagsire is missing EQ all that much, it can beat everything it needs to beat with Scald and Toxic, EQ is more for convienience than anything else. Even if it is just for BP the cost here is so small it hardly matters.