Well of course I agree, but none of us know what other issues may have played a part. Wait for the investigation to be completed. If the airplane is in fact not capable of a single engine landing in a 15kt crosswind without ending up on it's back, perhaps there should be a single engine crosswind limitation. Or, at the very least, an AD should be issued to fix the grabby breaks. I suspect there were things this pilot would do differently had he to do it again, but that's beside the point. Flinging dung before the final report comes out is irresponsible and poor form.
Max demonstrated crosswind for landing is 25KT. No reduction specified for single engine landing. Normal cross-wind technique works just fine on one or two engines.
Brakes aren't grabby per se, but they are powerful and could lock up if there's little weight on the wheels when they're applied..
FWIW, I'm guessing most of us have a few occasions where we would do things differently in a do-over. Like you said, let's wait until the investigation is over before we draw conclusions.