I apologize for the late reply Eruantien! I was able to get a response from the dev. team about the good points that you brought up.

We first asked the dev. team if they would be able to allow cowls to attach both head and body materia. They let us know that this unfortunately wasn't a possibility with the system.

The question we followed up with was is if they could allow cowls to attach head materia instead of body materia and they said that they are looking into if it would be possible.