I don't know if I would go as far as calling him an innovator. Flashcarts with SD slots existed before everdrives and also flashcarts with additional hardware (e.g. RTC for pokemon games) existed before everdrives. He kind of has to react to the offerings by EZ-Flash somehow and he can't compete in price, so he has to compete in functionality.
In my opinion and from my experience (owning both of them), the EZ-Flash OMEGA Definitive Edition is superior to the Everdrive GBA X5 Mini in every way (maybe except for power consumption). FRAM for saves, GBA Movie support, Rumble etc... the Everdrive GBA makes a really cheap impression in comparison. Also, the simplistic menu isn't helping that.