Just putting in my two cents that I love Yamislayers idea of a Non-Maximum Onwards and Maximum On Included Split. It's sad to see how many previously good wheels were destroyed.
However, there are obvious outliers... Screw, for example. I know it's maximum series, but let's be honest, it's not OverPowered by any stretch of the imagination, but in a metagame without basalt and bd145 around every corner, it'd actually be a great part. Not AMAZING (Vulcan is better, methinks).
The other one is every part of Killer Beafowl. Also, 130 and W2D. I could go on.
Personally, I'd like to keep it simpler, but to give parts fair usage, maybe we do what pokemon communities do, and define parts as "Uber". Hell, BD145, Basalt, 230, maybe RS or RSF (though MF, if allowed, would do plenty to handle them), and probably Fang and Beat would be uber (as fang would be horrific without basalt to balance it out).
Not sure how Big Bang and LDD would do without basalt, so that would need to be investigated. We'd need to set up a threshold to define what was uber (though banning new parts by default may be a good idea). This would be quite an amount of work, though, for the decision makers, and tournament hosts. Probably too much for it to be an official thing... Even in the simplest format of "Maximum and On-ALL BANNED" would be difficult, and again, probably too difficult.
Wolfblade, I like that tier idea, but IMO CS isn't really that hard to KO. I'd honestly just have tier two as RS/RSF removed. CS is perfectly easy to KO, even on Libruh. You can go back and see that Screw, which isn't as good as vulcan, gets a good win rate against CS (I'm not sure if it was Earth or Libruh, or both, that I tested on, but yeah). Though, for tier two, you might consider Libra, though I'm not really that sure on that.
Still, I think it would be nice to give us a much more varied metagame than the somewhat disappointingly narrow one we have now (BASALT. EVERYWHERE.)