Quote Originally Posted by Killa-Eyez View Post
The whole point of slicing them in the neck means that the humans controlling them are killed by that action, causing the vaporization of the titan and possibly also the human as it is merged with it. An explanation for the exception of Eren could be the injections his dad gave him. Maybe. I dunno.

I have a feeling the mystery behind the injections his dad gave him still won't provide all answers.
I don't think that's conclusive proof. Let's not forget Eren's titan acted like a normal titan when Eren chose to sleep. So, I reckon it's still possible the neck is a control point for a titan, but the titan can operate without a human in there (acting like normal, dumb titans). However, being a control point, the titan will die if it's destroyed as even its autonomous functions will cease.