This would waste this card completely, because some decks need to prepare to use this card or have to play a more defensive card before playing this one.
The effect itself is a drawback, because you need the right deck to play this one. Keywordsless and zero cost card really leaks power against other decks which have keywords or card with higher cost, ans they actualy need this cards to have at least some decent support cards. I mean, how can a zero cost deck win if there ist no conscript army, Orde rof the white lotus, moon shrine and plague? Its rather impossible. The same goes with keywordless decks. I'm actually playing a keywordless tower+ deck (ok, i have some keyword cards, but mainly its keywordless) and this type of deck is not that effective than undead or holy decks without its keywordless supporters (and there aren't that much, i think this card is among 2 or 3 the only one). So whats the sense of nerfing a card that is buffing an type of deck which relys on its supporters? It would be like removing Fairy, Zealot or Cleansing for holy decks (ok, they have a lot more supporters, so theyx would not bother that much).
Edit: And the situation you are mentioning comes only up with a chance of 2/15, and even then you need some zero cost or keywordless cards to make it effective, its rather now already very conditional.