Is B:D a competitive or even top-tier part?

Yes, BGrin is competitive, and even top-tier worthy.
54.17%
agumonx7, aurawolf, Barreto, BeyHyperK!LLeR, bvsb, Cake, CrystalPegasus, Demonic, Diablo-Beyz DBZ, FIREFIRE CPB, gaviota, humphrey, Infinity Lazer, King Loofa, Nexus™, Ocean, PhantomX, Real Madrid, Rockstar_Benji, ryuga300, ShinobuXD, TimeOut, UltimateOrion, Wally.web, Wombat, XtremeBlader132 		26
Yes, BGrin is competitive, but maybe not top-tier.
41.67%
BestBlader3, BeybladePants11, BillyBlast, Bobmcdoogal, Dark Aquario 55, darkwocher, DrPepsidew, Dual, Epicrules, Evilfaic, Ingulit, MacDuff, nrp, One Direction, Snoop Dog MS, Spdshadow, Tasty, tehfez, The Supreme One, Zilver2350 		20
No, BGrin is not competitive.
4.17%
Draciel516, Kei 		2
Total: 100% 48 vote(s)