Shouldn't it be the other way around? I.e. melee to detonate, heavy for recall. So that detonation would be the same button in both glaive only mode and in gun+glaive mode. Because something something consistency.
I'm not mad with mastery test, but I'm definitely mad at people defending new AW flight model. Now DE are going to use that lame excuse "some (weird) people like new AW flight model, so we're not going to change it". How dare they like something I don't like? Ah, well.