carpal vs cubital tunnel syndrome, diabetic

I went to the neuro for cubital tunnel symptoms. aka numb pinky and ring fingers in the night and any time elbow is bent or wrists are even slightly higher than elbow. I also have had type I diabetes for 24 years and have been treated for neuropathy in past. The diagnosis this time was carpal tunnel in both hands, told to start wearing the wrist splints and am going to get fitted for custom elbow braces for sleeping also. the nerve conduction velocity test showed no signs of cubital tunnel and the neuro says due to the diabetes the ulnar nerve is also weak/ damaged and eventually I will probably need that surgery too. He reccommends CTS but says noone will operate until my diabetes is better controlled. I do my best and even using an insulin pump and testing 6-8x a day my HbA1c is still in 8s. Ironically it''s in the past few months that I am getting better control that the pain and numbness has increased. I am confused as to how the diabetic neuropathy and carpal/cubitak tunnel syndrome co exist and if the surgery is done will I still have the reg neuropathy symptoms as I do in my legs and feet. Also it seems delaying surgery could cause more severe permanent nerve damage. My grip is significantly weaker and I get sharp pains( much like the shocks from the nerve conduction velocity test).. Any one else dealing with same situation?