I think this card and brave neos shouldn't be limited, just change brave neos summon requirements ("Neos + 1 elemental hero/neo spacial monster" instead of "Neos + 1 effect monster"), this is the only reason these two cards are ultra abused in the current meta. Konami released this structure deck with the purpose to add more supports to elemental hero and neo spacial archetypes, and not to see these cards used in all decks expect in a elemental hero deck. So this would be the perfect nerf for these cards, to make them work only with heroes and to stop the abuses of the current meta
I wish they would just give us prisma and stratos already. When I said I wanted more e-hero support, I never meant some neos thing that just gets shoved into almost everything that is not e-hero.
They have never made a functional change to a card, and they likely never will. Emerald Tortoise's change didn't change how the card works (we have no Main Phase 2, so there is no way to activate the effect they removed), and they obviously only did it because Emerald Tortoise was required for Rainbow Dragon to function.