THIS. THIS OP IS EXACTLY HOW GODDAMN BLEACH SHOULD HAVE BEEN.
No fucking Edo Period after life, no "hell is Mexico lololol" or any of that bullshit. Take the original cast from the first couple volumes or so, give them really bitching clothes, stick some swords in their hands, and tell them there's a bunch of Dios De Los Muertos-themed motherfuckers running around killing shit. Let them go take care of aforementioned Mexican demons, all the while being awesome and stylish.
Let some of the awesome of the original few volumes stay ("Send an ambulance *ker-smack,* the Rukia Rocket, Tatsuki being useful). Make it 52 eps long, maybe even let Aizen stay to turn out to be the big evil pimp that we know and love. No goddamn power levels.
Best anime every, A++, would watch again. Goddamn.