Everything you need to know has been discussed and shared. (Step climb, plan for more fuel, plan a route with favorable winds, etc.)
It’s unlikely that there are issues with the fuel burns. If you’re burning through a 747-8 tanks in an hour, and they’re topped off then we can reopen this. I can say that that’s not the case and I don’t see any issues with the fuel burns we have in the Infinite Flight fleet.