If gF is indeed mediocre at stamina, it can definitely be used for zombie/lad combos like 10Proof Atomic/Bearing/Eterna/Absorb(?). Or as a left-spin balance attacker, such as 0Bump Xtreme'/Atomic/Orbit/Destroy. Before paying attention to the WBO I always used dF on tornado-staller/attack hybrids and it had mild success. Maybe it's successor will do better in that regard.
So to answer your question: Nobody really knows yet
Beyblade Burst is cool, I once made a continuation of MFB, but I stopped, but now I've restarted (Then stopped again). Geist Fafnir is also pretty cool
MR System Beyblade:
https://worldbeyblade.org/Thread-4th-Season-MR-System