Board Thread:Manga/@comment-34196931-20190708230504/@comment-33555938-20190712122739

To break it down: if he were to transform, Zeke would get caught in, same with eren, and all of the other titans Zeke currently controls, now that gives them a disadvantage if he were to do this.

Eren is also fighting something and isn't built to take an explosion like reiner was, so its really just a lot of reasons, actually. But say he did get far enough, how would that affect everything else? People are in there, important ones at that, so I don't think that he'll be going colossal right now.