I'm glad it won't. 343i should improve the writing but also not drop things as a reaction to some parts of the community. Halo 3's story suffered due tho the backlash they received with the Arbiter in Halo 2 and it could be argued that Halo 5 suffered somewhat aswell because of early criticisms of Halo 4's story.
I don't think they will be dropping the Prometheans.
They need to fundamentally change how they feel to fight because right now they are not fun.