When it comes to story development or plot, Bleach has never been on the good side of that. Most good moments in Bleach are achieved through the fights. Seeing each captain release their bankai for the first time or being forced to finally show their true power like with this Quincy arc.
After Aizen's defeat during the arrancar saga, I haven't been remotely interested in this story on the same level as I was back then. These Quincies don't move me at all, and I don't remember over half of them and we are still on this arc, but I remember every single Espada and that's been over 4 years ago. The development and hype the Vasto Lorde received while under Aizen was just awesome and the abilities were much more entertaining than the Quincies. Everytime a new Espada appeared, I couldn't wait to see their release form. Ulquiorra, Grimmjow and Nnoitra being my favs, it's a shame that Ulquiorra will never return.
Even Grimmjow's return brought this manga back to it's past glory and that's only because he's a former Espada.
Once Aizen joins the battle and gets out of that chair, it will get better than it has been.