Hueco Mundo gave us Pesche Guatiche, that only made it better then anything post HM. Nel is cool, Chad and Uryuu are actually useful. Mayuri is at his absolute best trolling the fuck out of Szayelaporro.
Wishful thinking that Aizen will take down Valkryie or Haschwalth, good chance we don't seen him in anything other then background for the rest of the manga lol. How could Kubo top Aizen's Shikai. Wasn't the only weakness that you had to be touching the sword to see through the illusion? Even then i recall the commander doing it and Aizen brushing it off easily. My guess is he never intended to give us his Bankai