Re: surgery again for osteochandral defect!
Yes, weight bearing too soon is probably why your last surgery didn't work, so keep your hopes up that this one will, and be glad that your new surgeon knows better.
The microfracture is a pretty minor surgery, but if he has to do the OATS while he's in there, that's major but will hopefully last longer, as well. I'm personally not convinced that any of these remedies are permanent. They certainly haven't been for me.