Its hard to say what to ask without knowing your situation. I'm going to make an assumption that your diabetes is like that of all Type 2's, it is progressing. Most T2 get sent off to an endo when their diabetes advances past the comfort level of your average general practitioner.
Many times a endo visit for a T2 means it is time for insulin. If that's the case the question should not be how can I avoid it but rather how can we make things better and indicate you are willing to do whatever is necessary that is within your power.
Ask what your goals and targets should be, ask detailed questions about any treatment that is prescribed, especially if insulin is involved. How much and how often, when to make changes, if at all, Ask what should trigger you to make unscheduled contact with his or her office. Also ask about how often to test. And by all means ask about your neuropathy and any other complications you may have.
Doctor are busy folks, many will try to rush through the visit if you let them, remember you are paying the bill here. Write down any questions because the doctor will attempt to control the direction of the visit. By writing questions down you won't forget to ask.