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I think (mega)blaziken deserves to be ranked at least in B, it s really powerful espescialy under groudon s sun and speed boost makes it very scary:
252+ Atk Life Orb Blaziken Flare Blitz vs. 184 HP / 28 Def Xerneas in Sun: 208-247 (92.8 - 110.2%) -- 62.5% chance to OHKO
While metagross is arguably the best poke around and you have to prepare your team for it can be checked or revenge killed and it has some counters and it takes a mega slot , so it s not broken like mega mence was and way easier too check than greninja was , so i m voting for no ban