No denying the disposable armor is silly.
Diana took on Doomsday with nothing but her native power and held her own admirably. Superman beat him without needing to resort to tech. At the end of the day? What does it really matter? They thought they needed additional assistance against Doomsday. Doomsday attacks. No additional assistance is available. They fight like heroes anyway. They win the day. Turns out they didn't need the assistance after all.
I really don't see a problem. Personally I don't like the idea of Superman feeling like he needs to run for his "Anti-Doomsday Suit" every time Doomsday appears. Ditto for Diana. That's Batman's shtick because he NEEDS that shtick. Superman and Wonder Woman are the two most powerful heroes in the DCU. I prefer to see them show everyone that THEY can defeat any threat. Not that they can.....only when they brought their tech.