User blog comment:Xilinoc/Ch. 675 - Blood for My Bone/@comment-26912075-20160526152113/@comment-24769684-20160526203228

A lot of my problems with this powerup come from my problems with Ichigo's character handling as a whole. Guy has been so marginalized that I think Kubo is having trouble keeping the old while building up the new at the same time. If Ichigo's Hollowfication had at least played some kind of role in the beginning of this arc, when Ichigo was trying to balance out his various sources of power, I'd probably cut this a bit more slack.

I also think this transformation would have served a much better purpose in the final battle against Aizen. The entire Arrancar arc was focused on Ichigo learning to control his Hollow powers, and that transformation being its apex would have given that arc a much more complete feeling. But instead Ichigo loses all control of himself and is too afraid to do much else after that. Then we get Final Getsuga Tensho as a replacement which came out of ABSOLUTELY NOWHERE. It really soured up the last part of the arc and this arc as well, because the main focus of this arc should have really been Ichigo mastering his Quincy abilities and combining them into his ultimate Zanpakuto. But no, we have to resurrect this unresolved plot point in order to have everything make sense.