It's really not blasphemy for Burst have upgrades to beyblades not belong to the original owner. It's already established these beyblades were generally made by themselves, in cases like Aiga or Drum's new layer bases, and we could assume that Lodin and Fumiya were inspired by the success of Lui and Free and wanted a beyblade that had their features. I mean heck, Aiga was inspired by Valt to make his own bey, sure he didn't make his own Achilles but same process.
Unlike MFB, there's no legendary beast or special responsibility or role owning these beyblades, so some random guy owning Longinus isn't the same as some random guy owning L-Drago.
That does beg the question as to why they don't have Spriggan Requiem, Sieg Xcalibur, God Valkyrie, Drain Fafnir, Nightmare Longinus owned by random generic people in the anime, considering they're owned by some of the strongest bladers in the God series. And I mean during Cho Z as well, where God beys became fodder.
My Cho-Z Reaper Deathscyther .12.Cr concept render, click below to see!
No I don't plan on doing more yet.
I should probably go back to making fan custom Zero G beyblade concepts again