Besides, how impressive can Shinji's bankai be when all bankai is an amplification of a shinigami's shikai; which in Shinji's case happens to be the inversion of visual perception. Leaving Shiniji'a bankai to be..... A REALLY reversing inversion of visual perception??? lol.
That being said, I do like Shinji's character and have been wanting to see more of his capabilities since his little brawl with Grimmjow, and short lived victory with Aizen. So, in that regard, I still feel your pain!
May Shinji make a comeback with hallowfication!!!! Maybe even like Ichigo during his fight with Ulq!!!1 That would be pretty sweet.
P.S. I still want to see all the bankais, including Shinji's!