Neos Fusion can be negated via many cards. In this reply I will mention some cards that can simply negate it easily. Use Horus Level 8 to negate spell card effects. Magician Navigation can also negate it. silent magician will negate it too. To conclude my reply getting at least 1 copy of neos fusion is very competitive for many decks.
So because X card exists then Neos Fusion can stay? That's flawed logic just because a counter exists doesn't mean that the card is any less broken. I'd prefer Foolish Burial to Neos Fusion because at least that doesn't give you a 2500+ ATK monster for free with up too 2 protections for said monster. The sooner its gone or dealt with the better. Too abusable In decks.
Neos Fusion was a mistake and think Konami realise this so expect to see it either gone or on the limited 3 if that ever comes in along with Neos himself.