right now you can add images to the SMS review request, but it would be much more beneficial and flexible to be able to add the images through links like all the other SMS images we send.
I use a certain tool that personalizes each image to the end customer use a merge field in the link and this can not be done the way the SMS review request is set-up right now.
I think just having the review request feature in workflows be fully customizable would be very clutch.