Comprehensive evaluation is generally the better way to go, as otherwise specialists only see their little part of the elephant.

And while I know some people have anecdotally-positive experiences with listening therapy, I would caution you that there is negligible research supporting its effectiveness, and some potential for damage to hearing. It tends to be recommended by OTs, who are, I have to mention, particularly prone to fad treatments, as a field.

...pronounced like the long vowel and first letter of the alphabet...