[Pokestick, good times.]

Spoiler:

Okay, so the very reason shinigami fight the quincy in the first place is that they eradicate things without a trace.

Old guy's bankai... LET'S ERADICATE THINGS WITHOUT A TRACE! Also insanely hot super flame armor and you're killing the entire dimension you're fighting in.

It's superbly powerful though. It's what we would expect, definitely.