And, there's a reason they trust attack. Look at the Italian Metagame thread in the advanced forum.
Honestly, in the US/UK/Whatever, generally, attack has never been common in tournaments, even when it was getting such amazing results. It's just too risky with Self-KO's, for most people who don't practice enough. I mainly use it more because a) There are never any tourneys near me, and b) because it's more interesting.
There's no real change to the metagame, and it needs more time to develop.
I'm just suggesting you're making something out of nothing. Even if you're right, we definitely need more time to see how this new metagame pans out, as I still believe it needs to re-equilibriate.
Frankly, from what testing I've done so far, if I had to just pick a beyblade to use, in a theoretical Perth tourney, disregarding any knowledge of my opponent, it'd still be MF Lightning L Drago CH120RF, MF Gravity Perseus R145RF, or something on Metal Flat, either way, an attack type. This is despite the fact I own pretty much every top tier defense and stamina part (except earth/burn mold 1 and Virgo, but they're now basically outclassed anyway). I've never really struggled to use them, and Lightning L Drago, from what I saw before my CH120's broke, and since then just using 145, it is still a horrible prospect to stare down. It's just hard to use, moreso at 145, so people need to practice, practice, practice, at the cost of a few RF's (honestly, TT would make a killing on 5 packs of RF's).