I would think you will be fine. My doc told me to only loose 10-15 lbs. because I was so close to the BMI used to qualify for insurance. I've heard that the rule of thumb is once you get your approvals you should try to lose as much weight as you can. 1) it helps you in the surgery itself as internal fatty deposits make it more difficult for the surgeon, and 2) you tend to be a little more limited on how much weight you will lose with the sleeve so the better head start you have the closer or quicker you get to your goal weight and beyond.
My other issue right now is that I have not had a lot of information about post op, diet, menu, foods, etc. given to me. I feel like I've been sort of on my own. My doc says they will give me information, but I really am sort of a planner, and I want to know what I need to have in-house, stockpile, etc. I don't want to do this by trial and error. I feel like there should just be more info out there on a sample weeks menu, or some lists of basic foods to have on hand. I'm not a nutritionist so my knowledge of all food type(most Proteins, etc.) has been limited I guess. Desperately searching through these forums for some good info.