Gonna try and review MFB so far....
MFB
The Good:
Many different types of tracks including useful gimmicks.
Innovative tips such as CS, R2F, AS, etc.
Metal mass makes battles more dynamic and long.
New launchers
CWs have very nice aesthetics.
Parts are becoming easier to get for the Western society.
Are very customizable.
4D bottoms allow change of patterns in the attack stadium.
4D also allows different modes of MWs.
The bad:
The CW & Facebolt don't affect the game as much as they should.
Because metal has more mass for more power, metal wheels are more round to stop instant KO.
Many parts are recycled throughout the releases, such as 145, WD, 125, etc.
Most of these gimmicks are reruns of plastic gimmicks.
4D does allow more modes for the specific parts, but the bottoms allow even less customization. Pegasis F
is effectively a 2/3 layer beyblade.
Only certain beyblades can spin Left.