Despite the mistakes, I managed to finish the first sleeve on the sweater. Being the stubborn cuss that I am I decided that I had planned on ribbed cuffs so by golly that's what I was going to have despite the fact that I hadn't tapered the sleeve nearly as much as I should have.
I did a few inches of decreasing every other round, and then I switched from the size 10 needles to size 7 and did an inch of ribbing. I then switched from the size 7 to size 3 to really pull in the cuff. It worked.
The sleeve is a lot more full before the cuff than I had wanted but actually I kind of like it and it wears pretty well.
Whatcha think? Total disaster?