safetypee, the baggage diversion was a b-session while we wait. I think most have been waiting for some data to see what the actual problem was - whether associated with the braking system itself, the initial absence of spoiler deployment/subsequent deployment by the F/O, and perhaps why JBI (or CRFI) or whatever it is called now, wasn't available to the crew because braking action reports in such conditions are contextual and may not apply to one's own airplane.
I believe once airborne the actual landing distance required is the calculation that is done and as you know those in-flight Advisory performance charts provide numbers for braking action, WAT conditions, wind, reversers etc.
And this was an excursion off the side and not off the end, so something other than runway distance required/availabe was at work perhaps?