If that were true sacred sword would not be doing so well. the thing is a yarded BEWD is largely a +1 to my decks, just as a banished ruler is to a D ruler deck.
ninjas tend to rely on ninjitus art of super-transformation, and THAT, relies on levels, and this game is now largely XYZ based, and has lots of interrupting plays to the ninja theme.if not for that though I'd like it.
They have 12 very live cards (the Dragon Lords) to suit 3 Sacred Swords, and the Dragon Lord's search upon being banished makes the Swords = Pot of Greed for them. You on the other hand only have 3 BEWDs + 1 Darkstorm that you could spare for 3 Trade-In. This weak ratio is exactly why a lotta Decks that tried to go for "draw power" ages ago did not succeed. The lack of cohesiveness ended up working against them. It's also exactly the reason why the Mali/Destiny Draw engine is surely. Stratos mattered that much. Malicious by itself, however, is still very good.
That minor "limitation" of Super Transformation is not a big deal and does not make it any lesser of a threat. Ninja Decks are loaded with Traps, which forces your opponent to commit to the field if they want to get to you, and that naturally means they will be putting forth Xyz Material for you to take before they have a chance to Xyz Summon. There is no doubt that Super Transformation is an effective & disruptive card. I now realize just how naive many of us had/have been for having weak-reasoned preconceptions that has led to blind acceptance or dismissal of cards.