What form of dysmotility are you dealing with? There can be a variety of problems ranging from achalasia, spastic or diffuse esophageal spasms, to non-specific and secondary esophageal motility disorders (related to scleroderma, diabetes mellitus, and other conditions).
Have you actually seen a person who deals exclusively with dymotility problems? Have you had motility testing? If not, you may want to consider it. Pinning down exactly what is going on may result in someone being able to tell what foods to eat and what form to eat them in. If this is a true dysmotility, you may not be able to get the muscles to move certain forms of food from the mouth to the stomach if the muscles themselves aren't correctly working.
There is a procedure that can be done to help you. A doctor does a endoscope and dilates the esophagus while you are under light medication. It helps let the food pass through better. Some people have to have it done once a year. Your esophagus is having spasms probably so the food is having a hard time passing through. There is also a medication you can take to relax your muscle better so food will pass through better.