Am I a good candidate for an arm lift revision? (Photos)

I had an arm lift 9 months ago and feel that too much loose skin remains. My surgeon agrees more skin could come off and has offered to do a revision. I’m struggling to weigh the pros and cons and come to a decision on how to proceed. I'm really unhappy with the amount of loose skin that remains, but since the surgery, I have no feeling in the backside of my upper left arm. Massage, lymphatic drainage and acupuncture have not helped. I'm worried a revision will bring about further nerve damage to this arm or to the right arm (which is currently fine). My incisions have healed up nicely so I’m also reluctant to touch those a second time.